Our underwear for periods absorbs your flow, helps control odor, wicks moisture, and helps prevent leaks — so you feel fresh, dry, and comfortable throughout the day! No other period products are required. Our period-absorbing underwear is machine washable and reusable— so you can wear, wash, and wear again!
Yep. Our period underwear is washable and reusable, so you can wear it, wash it, and wear it again, just like regular underwear.
Follow our care instructions to keep your undies in tip-top shape.
Our newest period-absorbing underwear styles hold up to 12 regular tampons' worth of flow and are leakproof all day up to 12 hours. No other period products are needed.
Our newest period-absorbing underwear features our signature, innovative built-in absorbent technology within the gusset of the underwear — a moisture-wicking top layer, an ultra-absorbent core layer, and our LeakSafe™ barrier that leaves you feeling fresh and dry.
The positioning of the absorbent gusset varies slightly by style but is positioned mainly towards the back. Our Thinx premium styles feature an extended gusset throughout the front and back for additional coverage to catch heavier flows.
Our period-absorbing underwear handles blood clots similarly to a pad. Although the undies can't absorb the blood clot, they'll absorb the surrounding moisture to help you feel fresh and dry.
Nope! Our underwear is ultra-thin with built-in technology for absorbency without bulkiness. It features a moisture-wicking barrier to help prevent wetness so you stay fresh and dry. If your underwear starts to feel bulky or wet, or if they notice your flow spreading to the seams, these are signs that it's time for a fresh pair!
Our period-absorbing underwear is ultra-absorbent, helps control odor, and wicks moisture to help keep you fresh and dry. Follow our care instructions to keep your undies in tip-top shape.
Our period-absorbing underwear is ultra-absorbent, moisture-wicking, and helps control odor to help keep you fresh and dry. Our newest styles feature our all-day leakproof absorbency for period protection up to 12 hours.
If your undies have yet to reach capacity, we recommend changing them at least once every 12 hours to avoid leaks.
Thinx underwear is safe. Per- and polyfluoroalkyl substances, also known as PFAS, are absolutely not part of our product design and we do not treat our finished products with PFAS. We also take measures to help ensure these substances are not added to our products through material, design, production, facility, and supplier controls. We care deeply about the materials used in our products, putting comfort and safety at the core of our design, development and manufacturing.
Toxic Shock Syndrome (TSS) is associated primarily with tampon use. Do not use period-absorbing underwear on open cuts, abrasions, or incisions.
Our underwear for periods absorbs your flow, helps control odor, wicks moisture, and helps prevent leaks — so you feel fresh, dry, and comfortable throughout the day! No other period products are required. Our period-absorbing underwear is machine washable and reusable— so you can wear, wash, and wear again!
Yep. Our period underwear is washable and reusable, so you can wear it, wash it, and wear it again, just like regular underwear.
Follow our care instructions to keep your undies in tip-top shape.
Our newest period-absorbing underwear styles hold up to 12 regular tampons' worth of flow and are leakproof all day up to 12 hours. No other period products are needed.
Our newest period-absorbing underwear features our signature, innovative built-in absorbent technology within the gusset of the underwear — a moisture-wicking top layer, an ultra-absorbent core layer, and our LeakSafe™ barrier that leaves you feeling fresh and dry.
The positioning of the absorbent gusset varies slightly by style but is positioned mainly towards the back. Our Thinx premium styles feature an extended gusset throughout the front and back for additional coverage to catch heavier flows.
Our period-absorbing underwear handles blood clots similarly to a pad. Although the undies can't absorb the blood clot, they'll absorb the surrounding moisture to help you feel fresh and dry.
Nope! Our underwear is ultra-thin with built-in technology for absorbency without bulkiness. It features a moisture-wicking barrier to help prevent wetness so you stay fresh and dry. If your underwear starts to feel bulky or wet, or if they notice your flow spreading to the seams, these are signs that it's time for a fresh pair!
Our period-absorbing underwear is ultra-absorbent, helps control odor, and wicks moisture to help keep you fresh and dry. Follow our care instructions to keep your undies in tip-top shape.
Our period-absorbing underwear is ultra-absorbent, moisture-wicking, and helps control odor to help keep you fresh and dry. Our newest styles feature our all-day leakproof absorbency for period protection up to 12 hours.
If your undies have yet to reach capacity, we recommend changing them at least once every 12 hours to avoid leaks.
Thinx underwear is safe. Per- and polyfluoroalkyl substances, also known as PFAS, are absolutely not part of our product design and we do not treat our finished products with PFAS. We also take measures to help ensure these substances are not added to our products through material, design, production, facility, and supplier controls. We care deeply about the materials used in our products, putting comfort and safety at the core of our design, development and manufacturing.
Toxic Shock Syndrome (TSS) is associated primarily with tampon use. Do not use period-absorbing underwear on open cuts, abrasions, or incisions.
We recommend following the hip measurement to find the most accurate size. Be sure to measure your hips at their widest point, derrière included! We recommend sizing up in underwear styles that fit below the natural waist, or if you're looking for the best fit postpartum. The underwear should fit snugly but not so tight that it becomes uncomfortable.
We're saying goodbye to our previous absorbencies and styles to make room for the future of Thinx! Our newest period underwear styles feature our all-day, leakproof absorbency for up to 12 hours of wear and our unique LeakSafe™ barrier that absorbs up to 12 regular tampons' worth of flow.
We couldn't wait any longer to introduce you to our newest styles, featuring our all-day absorbency for up to 12 hours of leakproof protection. Don't worry — we still have some exciting updates planned, so stay tuned!
See fabric & materials for information specific to each style.
Our underwear is not made or treated with PFAS.
Our period-absorbing underwear is not made with natural rubber latex.
Our products are not made with fragrance.
No, our Ultra Soft collection is not made with organic cotton. The cotton in our Ultra Soft collection is constructed with high-quality raw materials, making it soft and durable.
Our Ultra Soft underwear is made with TENCEL™ modal and cotton to bring you the ultimate comfort and softness during your period. Modal is a popular fabric for underwear because it's breathable and absorbent.
The TENCEL™️ modal used in our main body fabric includes over 80% plant-based fibers by weight, made from beech tree pulp. Our ultra-soft modal fabric is known for its softness and durability.
The TENCEL™ modal fibers in our Ultra Soft collection originate from renewable raw material, beechwood sourced from sustainable forests. TENCEL™ modal has a lower environmental impact than generic modal, using 3x less water and depleting 8x fewer fossil fuels.
Our Ultra Soft collection features unbelievably soft fabric made with a blend of TENCEL™ modal, cotton, and recycled lace details. Our Comfort Stretch collection is designed to be our most comfortable waistband. The no-dig waistband design lends to a comfortable and flattering fit without rolling.
Like all of our underwear, our Breathable collection absorbs your period. The main difference? The body fabric of these undies is made with an ultra-thin micromesh that helps keep you cool, fresh, and dry. We especially love these for travel, workouts, sports, or any activity.
We used SUPIMA® cotton, sourced through the Better Cotton Initiative (BCI). BCI is a non-profit working towards improving global cotton production for the people who produce it and the environment it grows in. BCI owns and stewards the Better Cotton Standard System: a system that encompasses a diverse range of activities and stakeholders, including those in cotton production, through the supply chain to consumer-facing retailers and brands.
Thinx for All is our line of comfy cotton period underwear in a streamlined selection of styles and colors. Each pair is designed with our built-in leakproof lining that absorbs your flow for up to 12 hours while staying discreetly thin and dry.
Thinx is our premium line of period underwear that comes in a wider variety of styles, fabrics, and absorbencies to work with your flow.
Thinx for All reflects our belief that everyone deserves access to a better period, and that starts with more affordable period underwear. To offer this menstrual underwear at its more accessible price point, we created a simple design with a single-lined cotton fabric body in a limited selection of colors and styles. Our newest period underwear styles feature absorbent LeakSafe™ technology for extra protection even on those heavy-flow days.
Thinx for All features the same built-in period protection as Thinx — it absorbs flow, wicks moisture, and helps prevent leaks so you stay fresh, dry, and comfortable. Our newest Thinx for All™ and Thinx premium styles both feature our LeakSafe™ barrier for up to 12 hours of protection.
The difference is in the material and style. Thinx for All is designed with comfy cotton in a streamlined selection of styles and colors, while Thinx is made with premium fabrics in more style options.
We love our Breathable styles for everyday use and exercise. These sweat-wicking undies help keep you dry, feel light as air, and are designed for no VPL (visible panty line).
We recommend our Breathable styles— period undies light as air, designed for no visible panty lines under tight clothing.
Yes, waking up in the morning to period blood stains is the worst. So, we designed our period Sleep Shorts specifically for this issue. Our Sleep Shorts are boxer-inspired pajama shorts with built-in bikini underwear. They feature an extended gusset (the center part of the underwear inside the shorts) for extra front-to-back coverage to help keep you dry throughout the night.
Our newest period-absorbing underwear styles feature our all-day, up to 12-hour leakproof absorbency, so they've got your back even if your period comes back heavier post-birth. Our underwear should not be used on open cuts, abrasions, or incisions.
We recommend following the hip measurement to find the most accurate size. Be sure to measure your hips at their widest point, derrière included! We recommend sizing up in underwear styles that fit below the natural waist, or if you're looking for the best fit postpartum. The underwear should fit snugly but not so tight that it becomes uncomfortable.
We're saying goodbye to our previous absorbencies and styles to make room for the future of Thinx! Our newest period underwear styles feature our all-day, leakproof absorbency for up to 12 hours of wear and our unique LeakSafe™ barrier that absorbs up to 12 regular tampons' worth of flow.
We couldn't wait any longer to introduce you to our newest styles, featuring our all-day absorbency for up to 12 hours of leakproof protection. Don't worry — we still have some exciting updates planned, so stay tuned!
See fabric & materials for information specific to each style.
Our underwear is not made or treated with PFAS.
Our period-absorbing underwear is not made with natural rubber latex.
Our products are not made with fragrance.
No, our Ultra Soft collection is not made with organic cotton. The cotton in our Ultra Soft collection is constructed with high-quality raw materials, making it soft and durable.
Our Ultra Soft underwear is made with TENCEL™ modal and cotton to bring you the ultimate comfort and softness during your period. Modal is a popular fabric for underwear because it's breathable and absorbent.
The TENCEL™️ modal used in our main body fabric includes over 80% plant-based fibers by weight, made from beech tree pulp. Our ultra-soft modal fabric is known for its softness and durability.
The TENCEL™ modal fibers in our Ultra Soft collection originate from renewable raw material, beechwood sourced from sustainable forests. TENCEL™ modal has a lower environmental impact than generic modal, using 3x less water and depleting 8x fewer fossil fuels.
Our Ultra Soft collection features unbelievably soft fabric made with a blend of TENCEL™ modal, cotton, and recycled lace details. Our Comfort Stretch collection is designed to be our most comfortable waistband. The no-dig waistband design lends to a comfortable and flattering fit without rolling.
Like all of our underwear, our Breathable collection absorbs your period. The main difference? The body fabric of these undies is made with an ultra-thin micromesh that helps keep you cool, fresh, and dry. We especially love these for travel, workouts, sports, or any activity.
We used SUPIMA® cotton, sourced through the Better Cotton Initiative (BCI). BCI is a non-profit working towards improving global cotton production for the people who produce it and the environment it grows in. BCI owns and stewards the Better Cotton Standard System: a system that encompasses a diverse range of activities and stakeholders, including those in cotton production, through the supply chain to consumer-facing retailers and brands.
Thinx for All is our line of comfy cotton period underwear in a streamlined selection of styles and colors. Each pair is designed with our built-in leakproof lining that absorbs your flow for up to 12 hours while staying discreetly thin and dry.
Thinx is our premium line of period underwear that comes in a wider variety of styles, fabrics, and absorbencies to work with your flow.
Thinx for All reflects our belief that everyone deserves access to a better period, and that starts with more affordable period underwear. To offer this menstrual underwear at its more accessible price point, we created a simple design with a single-lined cotton fabric body in a limited selection of colors and styles. Our newest period underwear styles feature absorbent LeakSafe™ technology for extra protection even on those heavy-flow days.
Thinx for All features the same built-in period protection as Thinx — it absorbs flow, wicks moisture, and helps prevent leaks so you stay fresh, dry, and comfortable. Our newest Thinx for All™ and Thinx premium styles both feature our LeakSafe™ barrier for up to 12 hours of protection.
The difference is in the material and style. Thinx for All is designed with comfy cotton in a streamlined selection of styles and colors, while Thinx is made with premium fabrics in more style options.
We love our Breathable styles for everyday use and exercise. These sweat-wicking undies help keep you dry, feel light as air, and are designed for no VPL (visible panty line).
We recommend our Breathable styles— period undies light as air, designed for no visible panty lines under tight clothing.
Yes, waking up in the morning to period blood stains is the worst. So, we designed our period Sleep Shorts specifically for this issue. Our Sleep Shorts are boxer-inspired pajama shorts with built-in bikini underwear. They feature an extended gusset (the center part of the underwear inside the shorts) for extra front-to-back coverage to help keep you dry throughout the night.
Our newest period-absorbing underwear styles feature our all-day, up to 12-hour leakproof absorbency, so they've got your back even if your period comes back heavier post-birth. Our underwear should not be used on open cuts, abrasions, or incisions.
Yup! Our newest period underwear styles feature our all-day, leakproof absorbency for protection for up to 12 hours. They hold up to 12 regular tampons' worth of flow — no other period products are required. If you prefer, though, you can wear them as backup protection with tampons or menstrual cups.
Our newest period underwear styles feature our all-day leakproof absorbency for up to 12 hours of period protection. No pads, tampons, or other period products are needed.
We recommend starting with 3-5 pairs so you’ll be protected for your entire period without doing extra laundry. We offer Saver Sets and Custom Set discounts so you can build your collection and get more for less.
Our newest styles feature all-day leakproof absorbency for period protection up to 12 hours. Change your pairs at least every 12 hours to help prevent leaks.
We've heard from many parents in our community that they love wearing Thinx for All Leaks for light bladder leak protection postpartum and Thinx for when their periods return!
Reusable absorbent underwear should not be used with open cuts, abrasions, or incisions. Check with your doctor before using any new product during this time.
Thinx is designed specifically to absorb menstrual flow, but we also make bladder leak underwear! Check out our sister brand, Thinx for All Leaks.
We don't recommend wearing Thinx reusable underwear as a swimsuit or underwater. Their purpose is to keep you fresh and dry!
Yup! Our newest period underwear styles feature our all-day, leakproof absorbency for protection for up to 12 hours. They hold up to 12 regular tampons' worth of flow — no other period products are required. If you prefer, though, you can wear them as backup protection with tampons or menstrual cups.
Our newest period underwear styles feature our all-day leakproof absorbency for up to 12 hours of period protection. No pads, tampons, or other period products are needed.
We recommend starting with 3-5 pairs so you’ll be protected for your entire period without doing extra laundry. We offer Saver Sets and Custom Set discounts so you can build your collection and get more for less.
Our newest styles feature all-day leakproof absorbency for period protection up to 12 hours. Change your pairs at least every 12 hours to help prevent leaks.
We've heard from many parents in our community that they love wearing Thinx for All Leaks for light bladder leak protection postpartum and Thinx for when their periods return!
Reusable absorbent underwear should not be used with open cuts, abrasions, or incisions. Check with your doctor before using any new product during this time.
Thinx is designed specifically to absorb menstrual flow, but we also make bladder leak underwear! Check out our sister brand, Thinx for All Leaks.
We don't recommend wearing Thinx reusable underwear as a swimsuit or underwater. Their purpose is to keep you fresh and dry!
Wash your period underwear before wearing them. Machine wash with like colors on cold, line dry, and repeat. Do not iron, bleach, or dry clean. Replace your Thinx at 30 washes. Visit our How to Wash page for more details.
Machine wash the underwear on cold to keep them in tip-top shape. The standard cold wash is 30C.
Yep! Washing machines will dilute the contents almost immediately, and your other clothes should not stain if you're washing on cold.
The drying time of our period-absorbing underwear depends on the style — moderate absorbency styles shouldn’t take longer than 10-12 hours to dry, and super absorbency styles shouldn’t take longer than 19 hours to dry under non-humid conditions. Drying times may be affected by humidity levels and the airflow of the space you hang them in.
Don't panic — a few cycles in the dryer probably won't hurt period-absorbing underwear. However, repeated exposure to the heat from dryers or irons will affect the underwear's elasticity, which helps prevent leaks, so don't make it a habit!
Pro tip: Use a mesh laundry bag to separate them from your other clothes for easy removal from the wash while the rest goes in the dryer.
Our absorbent underwear isn’t stain-resistant. However, the gusset lining is black to help prevent stains from showing.
Follow our simple care instructions to maintain your period underwear's performance. Replace them at 30 washes.
Dispose of period-absorbing underwear at 30 washes.
Wash your period underwear before wearing them. Machine wash with like colors on cold, line dry, and repeat. Do not iron, bleach, or dry clean. Replace your Thinx at 30 washes. Visit our How to Wash page for more details.
Machine wash the underwear on cold to keep them in tip-top shape. The standard cold wash is 30C.
Yep! Washing machines will dilute the contents almost immediately, and your other clothes should not stain if you're washing on cold.
The drying time of our period-absorbing underwear depends on the style — moderate absorbency styles shouldn’t take longer than 10-12 hours to dry, and super absorbency styles shouldn’t take longer than 19 hours to dry under non-humid conditions. Drying times may be affected by humidity levels and the airflow of the space you hang them in.
Don't panic — a few cycles in the dryer probably won't hurt period-absorbing underwear. However, repeated exposure to the heat from dryers or irons will affect the underwear's elasticity, which helps prevent leaks, so don't make it a habit!
Pro tip: Use a mesh laundry bag to separate them from your other clothes for easy removal from the wash while the rest goes in the dryer.
Our absorbent underwear isn’t stain-resistant. However, the gusset lining is black to help prevent stains from showing.
Follow our simple care instructions to maintain your period underwear's performance. Replace them at 30 washes.
Dispose of period-absorbing underwear at 30 washes.
Getting familiar with period products before you need them is a great idea! Wearing Thinx before getting your period can ensure you have the correct size and style to fit your needs.
If, for any reason, you're unhappy with your items, our products can be returned or exchanged within 45 days of purchase.
Shop our site to get leak protection delivered to your door. To shop Thinx Inc. undies in person, check out our store locator Please note we do not accept returns or exchanges for purchases made from third-party retailers.
While we do our best to ensure that our e-commerce experience is consistent, enjoyable, and functional across all modern browsers and devices, occasionally something small may not function properly on older browsers when an update to our code is pushed.
If you are having trouble logging in, creating an account, or placing an order, we highly recommend you first update your browser to the newest version.
Chrome | Firefox | Safari | Internet Explorer
Or, simply trying another browser usually works (we prefer Chrome).
We apologize for any inconvenience. If you still need help or are experiencing issues, please don't hesitate to contact us via our Help Center!
We accept nearly all local currencies for the countries we sell in. The currency will update automatically update based on your location. We provide fixed prices in the local currency for Canada, Australia, New Zealand, and the United Kingdom. The product price for the other countries is calculated based on their daily exchange rate. Order receipts and confirmation emails show the purchase price in local currencies.
We accept all major credit cards, including Flexible Spending Arrangement (FSA), Health Savings Account (HSA), and Health Reimbursement Arrangement (HRA) credit/debit cards. Express checkout is available via Shop Pay, PayPal, and Google Pay. Shop with your Thinx Inc. gift card that never expires. Or, buy now, pay later with AfterPay. Additional payment options may be available for select International countries.
Yes — all Thinx inc. underwear, including our menstrual products and bladder leak underwear, can now be purchased directly at checkout and via PayPal using Flexible Spending Arrangement (FSA), Health Savings Account (HSA), and Health Reimbursement Arrangement (HRA) credit/debit cards. If you experience any issues with the card at checkout, please check your balance — if there are enough funds in your account, you may need to contact an administrator at your plan to authorize a purchase on our site. Afterpay and orders processed in currencies other than USD are not eligible. If you prefer to check out using another method, please review your plan for details about applying for reimbursement. Depending on your insurance plan, you may be required to fill out a claim form with an itemized receipt, so keep your order confirmation email handy.
Customers in the United States can get free Standard Shipping on their first order when they create an account.
Our orders ship from our warehouse in Northampton, PA.
Yes! We currently ship to 24 countries around the world. Check our Shipping Policy to view our shipping rates and the list of countries we ship to. If your country isn't on that list, we apologize for any inconvenience! Check out our Store Locator to see if any retailers that serve you offer our products.
For orders shipping to Canada, the product price includes duties but does not include taxes (collected at checkout). For all the other countries we ship to, the product price includes duties and taxes.
Our team begins processing orders quickly (so you can get your undies fast!) so unfortunately, we're unable to make order edits or cancellations. We do offer a 45-day money-back guarantee. Once your order has shipped, you can visit our Returns Portal to process a refund or swap anything out.
Orders are processed Mon-Fri, before 5 pm EST, and are typically on their way to you within 1-2 business days. Delivery estimates vary by country. For additional shipping information and rates by country, view our Shipping Policy.
Track your order progress step by step. As soon as your order has completed processing, you'll receive a shipping confirmation with your order tracking details. If you placed the order under your account, you'll also see your tracking information under "order history" when you log in.
Getting familiar with period products before you need them is a great idea! Wearing Thinx before getting your period can ensure you have the correct size and style to fit your needs.
If, for any reason, you're unhappy with your items, our products can be returned or exchanged within 45 days of purchase.
Shop our site to get leak protection delivered to your door. To shop Thinx Inc. undies in person, check out our store locator Please note we do not accept returns or exchanges for purchases made from third-party retailers.
While we do our best to ensure that our e-commerce experience is consistent, enjoyable, and functional across all modern browsers and devices, occasionally something small may not function properly on older browsers when an update to our code is pushed.
If you are having trouble logging in, creating an account, or placing an order, we highly recommend you first update your browser to the newest version.
Chrome | Firefox | Safari | Internet Explorer
Or, simply trying another browser usually works (we prefer Chrome).
We apologize for any inconvenience. If you still need help or are experiencing issues, please don't hesitate to contact us via our Help Center!
We accept nearly all local currencies for the countries we sell in. The currency will update automatically update based on your location. We provide fixed prices in the local currency for Canada, Australia, New Zealand, and the United Kingdom. The product price for the other countries is calculated based on their daily exchange rate. Order receipts and confirmation emails show the purchase price in local currencies.
We accept all major credit cards, including Flexible Spending Arrangement (FSA), Health Savings Account (HSA), and Health Reimbursement Arrangement (HRA) credit/debit cards. Express checkout is available via Shop Pay, PayPal, and Google Pay. Shop with your Thinx Inc. gift card that never expires. Or, buy now, pay later with AfterPay. Additional payment options may be available for select International countries.
Yes — all Thinx inc. underwear, including our menstrual products and bladder leak underwear, can now be purchased directly at checkout and via PayPal using Flexible Spending Arrangement (FSA), Health Savings Account (HSA), and Health Reimbursement Arrangement (HRA) credit/debit cards. If you experience any issues with the card at checkout, please check your balance — if there are enough funds in your account, you may need to contact an administrator at your plan to authorize a purchase on our site. Afterpay and orders processed in currencies other than USD are not eligible. If you prefer to check out using another method, please review your plan for details about applying for reimbursement. Depending on your insurance plan, you may be required to fill out a claim form with an itemized receipt, so keep your order confirmation email handy.
Customers in the United States can get free Standard Shipping on their first order when they create an account.
Our orders ship from our warehouse in Northampton, PA.
Yes! We currently ship to 24 countries around the world. Check our Shipping Policy to view our shipping rates and the list of countries we ship to. If your country isn't on that list, we apologize for any inconvenience! Check out our Store Locator to see if any retailers that serve you offer our products.
For orders shipping to Canada, the product price includes duties but does not include taxes (collected at checkout). For all the other countries we ship to, the product price includes duties and taxes.
Our team begins processing orders quickly (so you can get your undies fast!) so unfortunately, we're unable to make order edits or cancellations. We do offer a 45-day money-back guarantee. Once your order has shipped, you can visit our Returns Portal to process a refund or swap anything out.
Orders are processed Mon-Fri, before 5 pm EST, and are typically on their way to you within 1-2 business days. Delivery estimates vary by country. For additional shipping information and rates by country, view our Shipping Policy.
Track your order progress step by step. As soon as your order has completed processing, you'll receive a shipping confirmation with your order tracking details. If you placed the order under your account, you'll also see your tracking information under "order history" when you log in.
We offer a 45-day trial on all orders, so if you’re unhappy with your purchase, we’ll try to make it right. Final sale items, Thinx “merch”, and gift cards are nonrefundable. Visit our online Returns Portal to begin a return or exchange.
Items can be exchanged for a different color/size, or a different style of equal or lesser value, refunded for a digital gift card, or refunded to the original payment method. Terms and Conditions may apply.
Sorry, that option isn’t available right now!
The process for refunding the original form of payment will be the same. Digital gift cards are only available to customers within the United States. If you are in the U.S. and looking to exchange for a different underwear size/color or another style, you can do so through our online Returns Portal. If you are outside the U.S., please contact our customer service team with your order number, exchange details (style, size, color), and shipping address, and we’ll process a manual exchange on your behalf.
Nope! Instead, we encourage you to pass unused and unopened pairs to a friend.
Items purchased in a Saver Set or Custom Set can be exchanged or returned individually. You can process a return or exchange directly through our online Returns Portal.
If you’re a customer located within the United States, we suggest returning the original item for a digital gift card. If you’re a customer outside of the U.S., we recommend returning the original item for a refund. In either case, be sure to sign up for back-in-stock alerts on your desired item's product page, so you'll be notified when it becomes available for purchase again.
Once your return is processed, you should see the funds appear back on your original form of payment in about 5-7 business days.
We typically process return orders within 1–2 business days. Once processed, US exchange orders are shipped via standard shipping and should arrive within 5–7 business days. International exchange orders are shipped via UPS Worldwide Expedited DDP.
Nope, gift cards never expire and can be applied to any purchase from our Thinx Inc. family of brands (Thinx for All Leaks, Thinx, and Thinx Teens)!
All you need is the gift card number to use your credit. How you choose to use your credit or whether you choose to give your gift card number to a friend is up to you!
We offer a 45-day trial on all orders, so if you’re unhappy with your purchase, we’ll try to make it right. Final sale items, Thinx “merch”, and gift cards are nonrefundable. Visit our online Returns Portal to begin a return or exchange.
Items can be exchanged for a different color/size, or a different style of equal or lesser value, refunded for a digital gift card, or refunded to the original payment method. Terms and Conditions may apply.
Sorry, that option isn’t available right now!
The process for refunding the original form of payment will be the same. Digital gift cards are only available to customers within the United States. If you are in the U.S. and looking to exchange for a different underwear size/color or another style, you can do so through our online Returns Portal. If you are outside the U.S., please contact our customer service team with your order number, exchange details (style, size, color), and shipping address, and we’ll process a manual exchange on your behalf.
Nope! Instead, we encourage you to pass unused and unopened pairs to a friend.
Items purchased in a Saver Set or Custom Set can be exchanged or returned individually. You can process a return or exchange directly through our online Returns Portal.
If you’re a customer located within the United States, we suggest returning the original item for a digital gift card. If you’re a customer outside of the U.S., we recommend returning the original item for a refund. In either case, be sure to sign up for back-in-stock alerts on your desired item's product page, so you'll be notified when it becomes available for purchase again.
Once your return is processed, you should see the funds appear back on your original form of payment in about 5-7 business days.
We typically process return orders within 1–2 business days. Once processed, US exchange orders are shipped via standard shipping and should arrive within 5–7 business days. International exchange orders are shipped via UPS Worldwide Expedited DDP.
Nope, gift cards never expire and can be applied to any purchase from our Thinx Inc. family of brands (Thinx for All Leaks, Thinx, and Thinx Teens)!
All you need is the gift card number to use your credit. How you choose to use your credit or whether you choose to give your gift card number to a friend is up to you!
We aim to create underwear that champions and supports bodies throughout different stages of life. From your first period to post-menopause and all the leaks in between. We aim to empower our customers with sustainable solutions while breaking taboos around bladder leaks and menstruation.
We craft our underwear carefully and consciously, from sustainable manufacturing processes to ethical working conditions. We’re proud to work with MAS, a global leader in ethical manufacturing based in Sri Lanka. MAS operates under three pillars: products changed for good, our planet changed for good, and lives changed for good. Visit our Manufacturing page to learn more about how we make our underwear and the incredible people who make them!
Body literacy is understanding the body and its functions, so that we can be more empowered when it comes to our health and wellness. Without body literacy, there is a rise in misinformation, stigmas, and shame around our bodies and its normal functions. At Thinx, we believe in challenging societal stigmas and giving more people access to body education. That’s why we created GetBodyWise.
Menstrual equity refers to equal and comprehensive access to menstrual hygiene products and the right to reproductive health education. Thinx actively supports menstrual equity by offering educational content and partnering with like-minded organizations to bring leak protection products to communities that need them most. Through our GetBodyWise program, we're working to fight societal stigmas and help empower more people with body literacy.
We aim to create underwear that champions and supports bodies throughout different stages of life. From your first period to post-menopause and all the leaks in between. We aim to empower our customers with sustainable solutions while breaking taboos around bladder leaks and menstruation.
We craft our underwear carefully and consciously, from sustainable manufacturing processes to ethical working conditions. We’re proud to work with MAS, a global leader in ethical manufacturing based in Sri Lanka. MAS operates under three pillars: products changed for good, our planet changed for good, and lives changed for good. Visit our Manufacturing page to learn more about how we make our underwear and the incredible people who make them!
Body literacy is understanding the body and its functions, so that we can be more empowered when it comes to our health and wellness. Without body literacy, there is a rise in misinformation, stigmas, and shame around our bodies and its normal functions. At Thinx, we believe in challenging societal stigmas and giving more people access to body education. That’s why we created GetBodyWise.
Menstrual equity refers to equal and comprehensive access to menstrual hygiene products and the right to reproductive health education. Thinx actively supports menstrual equity by offering educational content and partnering with like-minded organizations to bring leak protection products to communities that need them most. Through our GetBodyWise program, we're working to fight societal stigmas and help empower more people with body literacy.
Thinx Inc. is another iconic brand under the Kimberly-Clark family of brands. Together our family of brands (Thinx, Thinx Teens™, and Thinx for All Leaks) is committed to empowering *every body* with innovative solutions and social change.
Thinx and Thinx Teens are washable, reusable period underwear. Our newest styles absorb up to 12 regular tampons for all-day leakproof protection for up to 12 hours. Each pair is moisture-wicking, ultra-absorbent, and leak-resistant.
Our teen period underwear is available in standard youth sizing to fit younger bodies and in full-coverage styles to support first and early periods. Thinx adult line is available in sizes up to 4X and in various underwear styles to meet your preferences.
Thinx Teens is period-absorbing underwear designed for teen body shapes and sizes with narrower gusset and thigh dimensions. We designed Thinx underwear for periods for adult bodies (people who have already finished puberty), made with taller, curvier adult bodies in mind.
Use our handy size chart to toggle between the brands to find the best underwear size. We recommend following the hip measurement, as most underwear styles sit on the hips. Be sure to measure the hips at their widest point, derriere included!
Thinx and Thinx for All Leaks are reusable, absorbent underwear designed to replace disposable products. They absorb leaks, help control odors, and wick away moisture to help keep you dry and comfortable. They look and feel like regular underwear, so you can wear them, wash them, and wear them again. Thinx absorbs period flow, while Thinx for All Leaks is underwear designed for light bladder leaks.
The construction of Thinx for All Leaks underwear for bladder leaks differs from Thinx, as do the underwear styles, so sizing is a bit different. Thinx includes industry-standard plus-sizing through 4X, while Thinx for All Leaks sizes extend to 5XL. We recommend following the hip measurement for both brands to find the most accurate size for you, as most of our underwear styles sit on the hips.
We specifically designed Thinx for All Leaks to tackle the pH and viscosity of bladder leaks, which is lower than that of menstrual flow. If you experience light incontinence and your period, Thinx for All Leaks would be your best bet to prevent all your leaks. We don't recommend using our period underwear to protect against bladder leaks.
You deserve period and bladder leak products that give you the most comfort physically, mentally, and emotionally. All underwear in the Thinx family of brands has been certified based on the rigorous chemical safety requirements of the STANDARD 100 by OEKO-TEX® [20.HUS.04850 | HOHENSTEIN HTTI] since 2020 and now complies with the even more stringent OEKO-TEX® 100 Class II, Annexure IV, which includes meeting the requirements for Europe’s Regulation for Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) [20.HUS.04850 | HOHENSTEIN HTTI]. Thinx underwear is not made with PFAS.
We also test our finished products through an accredited, globally recognized third-party laboratory to help ensure they are compliant with all laws and regulations. These tests also include absorbency capacity, usability, and wearability.
Thinx is a member of the Apparel and Footwear International RSL Management Group (AFIRM) and aligns with the AFIRM restricted substances list (RSL) for suppliers of raw materials. We also require suppliers of our raw materials to sign a Supplier Code of Conduct and Chemical Supplier Agreement confirming compliance to the AFIRM RSL including the AFIRM restrictions on PFAS. For more information on the quality and safety of our products, see our Protection Promise.
We strive to make environmentally preferable choices that don’t compromise the integrity of the product that shows up on your doorstep. That means we choose paper and renewable resources as much as possible and work to minimize any plastic or non-renewable materials.
Paper: All paper and boards are FSC-certified (both old and new packaging, including inserts and boxes). They are all recyclable and biodegradable! It will take approx. 2-3 months for this process.
Polybag: Biodegradable.
Strings: Not recyclable but can give to a textile recycler. 65% Polyester and 35% cotton.
Mailer bag: Recyclable where plastic films are recyclable. Find a location here.
We are currently researching how to use biodegradable and recyclable packaging with soy-based or similar inks, as our supply chain and safe handling requirements allow.
Our undies are machine washable, reusable, and absorbent — there's *a lot* of science and development that goes into making them and ensuring they last. Replace them at 30 washes as a reusable alternative to single-use period products.
Yes! We're always thinking up new styles, colors, and products. Be sure to subscribe to our email list to get the first peek at new products, surprise sales, clever blog posts, and even a chance to win a free pair of undies!
Thinx Inc. is another iconic brand under the Kimberly-Clark family of brands. Together our family of brands (Thinx, Thinx Teens™, and Thinx for All Leaks) is committed to empowering *every body* with innovative solutions and social change.
Thinx and Thinx Teens are washable, reusable period underwear. Our newest styles absorb up to 12 regular tampons for all-day leakproof protection for up to 12 hours. Each pair is moisture-wicking, ultra-absorbent, and leak-resistant.
Our teen period underwear is available in standard youth sizing to fit younger bodies and in full-coverage styles to support first and early periods. Thinx adult line is available in sizes up to 4X and in various underwear styles to meet your preferences.
Thinx Teens is period-absorbing underwear designed for teen body shapes and sizes with narrower gusset and thigh dimensions. We designed Thinx underwear for periods for adult bodies (people who have already finished puberty), made with taller, curvier adult bodies in mind.
Use our handy size chart to toggle between the brands to find the best underwear size. We recommend following the hip measurement, as most underwear styles sit on the hips. Be sure to measure the hips at their widest point, derriere included!
Thinx and Thinx for All Leaks are reusable, absorbent underwear designed to replace disposable products. They absorb leaks, help control odors, and wick away moisture to help keep you dry and comfortable. They look and feel like regular underwear, so you can wear them, wash them, and wear them again. Thinx absorbs period flow, while Thinx for All Leaks is underwear designed for light bladder leaks.
The construction of Thinx for All Leaks underwear for bladder leaks differs from Thinx, as do the underwear styles, so sizing is a bit different. Thinx includes industry-standard plus-sizing through 4X, while Thinx for All Leaks sizes extend to 5XL. We recommend following the hip measurement for both brands to find the most accurate size for you, as most of our underwear styles sit on the hips.
We specifically designed Thinx for All Leaks to tackle the pH and viscosity of bladder leaks, which is lower than that of menstrual flow. If you experience light incontinence and your period, Thinx for All Leaks would be your best bet to prevent all your leaks. We don't recommend using our period underwear to protect against bladder leaks.
You deserve period and bladder leak products that give you the most comfort physically, mentally, and emotionally. All underwear in the Thinx family of brands has been certified based on the rigorous chemical safety requirements of the STANDARD 100 by OEKO-TEX® [20.HUS.04850 | HOHENSTEIN HTTI] since 2020 and now complies with the even more stringent OEKO-TEX® 100 Class II, Annexure IV, which includes meeting the requirements for Europe’s Regulation for Registration, Evaluation, Authorization and Restriction of Chemicals (REACH) [20.HUS.04850 | HOHENSTEIN HTTI]. Thinx underwear is not made with PFAS.
We also test our finished products through an accredited, globally recognized third-party laboratory to help ensure they are compliant with all laws and regulations. These tests also include absorbency capacity, usability, and wearability.
Thinx is a member of the Apparel and Footwear International RSL Management Group (AFIRM) and aligns with the AFIRM restricted substances list (RSL) for suppliers of raw materials. We also require suppliers of our raw materials to sign a Supplier Code of Conduct and Chemical Supplier Agreement confirming compliance to the AFIRM RSL including the AFIRM restrictions on PFAS. For more information on the quality and safety of our products, see our Protection Promise.
We strive to make environmentally preferable choices that don’t compromise the integrity of the product that shows up on your doorstep. That means we choose paper and renewable resources as much as possible and work to minimize any plastic or non-renewable materials.
Paper: All paper and boards are FSC-certified (both old and new packaging, including inserts and boxes). They are all recyclable and biodegradable! It will take approx. 2-3 months for this process.
Polybag: Biodegradable.
Strings: Not recyclable but can give to a textile recycler. 65% Polyester and 35% cotton.
Mailer bag: Recyclable where plastic films are recyclable. Find a location here.
We are currently researching how to use biodegradable and recyclable packaging with soy-based or similar inks, as our supply chain and safe handling requirements allow.
Our undies are machine washable, reusable, and absorbent — there's *a lot* of science and development that goes into making them and ensuring they last. Replace them at 30 washes as a reusable alternative to single-use period products.
Yes! We're always thinking up new styles, colors, and products. Be sure to subscribe to our email list to get the first peek at new products, surprise sales, clever blog posts, and even a chance to win a free pair of undies!
With Afterpay, you can buy now and pay for your order in 4 equal payments made every two weeks — no interest added.
To be eligible for Afterpay, the value of your cart must be between $35 and $1,000. Gift cards are not eligible. Afterpay payments are due in 4 equal installments every two weeks, automatically processed to the card you register on file. The first installment is due at the time of purchase.After adding products to your cart, select Afterpay as your payment method at checkout. If this is your first time using Afterpay, you'll be redirected to their website to register and provide your payment details. If you've used Afterpay before, you'll log in to your account to complete your order.
You can use Afterpay toward any Thinx Inc. purchase of period and bladder leak underwear. Gift cards are not eligible.
Unfortunately, no — Afterpay is only available to customers in the US.
With Afterpay, you make your first payment at the time of purchase. The remaining amount due will be deducted automatically in three equal installments every two weeks from the payment method you've set up. If you want to make a payment before your next installment is due, log in to your Afterpay account — any remaining amount still owed will be updated accordingly.
Late fees may apply if you cannot make a payment. Take a look at Afterpay's complete terms and conditions for more details.
Afterpay orders are processed just like any other US standard shipping order. Once confirmed, orders typically ship out in about 1-2 business days. US standard shipping should arrive within 5-7 business days. For more information, check out our shipping details.
Afterpay will determine your spending limit and can approve or deny purchases based on payment history.
You can also use a gift card with Afterpay to pay for your purchase.
All Thinx Inc. underwear and apparel are eligible for purchase using Afterpay at checkout. Thinx Inc. gift cards are not eligible.
We offer a 45-day money-back guarantee on all purchases, including Afterpay. In this case, the original form of payment, Afterpay, is refunded. When you return item/s from an order, Afterpay will deduct the item amounts from the purchase total and adjust any remaining installments accordingly. In the case of complete order returns, Afterpay will refund any payments already made towards the total purchase and change any remaining installments to $0.
Visit Afterpay for additional information and answers to your questions.
With Afterpay, you can buy now and pay for your order in 4 equal payments made every two weeks — no interest added.
To be eligible for Afterpay, the value of your cart must be between $35 and $1,000. Gift cards are not eligible. Afterpay payments are due in 4 equal installments every two weeks, automatically processed to the card you register on file. The first installment is due at the time of purchase.After adding products to your cart, select Afterpay as your payment method at checkout. If this is your first time using Afterpay, you'll be redirected to their website to register and provide your payment details. If you've used Afterpay before, you'll log in to your account to complete your order.
You can use Afterpay toward any Thinx Inc. purchase of period and bladder leak underwear. Gift cards are not eligible.
Unfortunately, no — Afterpay is only available to customers in the US.
With Afterpay, you make your first payment at the time of purchase. The remaining amount due will be deducted automatically in three equal installments every two weeks from the payment method you've set up. If you want to make a payment before your next installment is due, log in to your Afterpay account — any remaining amount still owed will be updated accordingly.
Late fees may apply if you cannot make a payment. Take a look at Afterpay's complete terms and conditions for more details.
Afterpay orders are processed just like any other US standard shipping order. Once confirmed, orders typically ship out in about 1-2 business days. US standard shipping should arrive within 5-7 business days. For more information, check out our shipping details.
Afterpay will determine your spending limit and can approve or deny purchases based on payment history.
You can also use a gift card with Afterpay to pay for your purchase.
All Thinx Inc. underwear and apparel are eligible for purchase using Afterpay at checkout. Thinx Inc. gift cards are not eligible.
We offer a 45-day money-back guarantee on all purchases, including Afterpay. In this case, the original form of payment, Afterpay, is refunded. When you return item/s from an order, Afterpay will deduct the item amounts from the purchase total and adjust any remaining installments accordingly. In the case of complete order returns, Afterpay will refund any payments already made towards the total purchase and change any remaining installments to $0.
Visit Afterpay for additional information and answers to your questions.
Our referral program is one way for you to spread the Thinx Inc. love! If you refer a friend, they get $10 to spend on any Thinx Inc. product (Thinx for All Leaks, Thinx, or Thinx Teens). If they make a purchase, you also get $10 in credits. You can earn up to $500 in Thinx inc. credit by referring up to 50 friends. To get started, sign up or log in to your account. Share your unique referral link directly or through email, SMS, WhatsApp, or Facebook!
If you’re referring a friend, your $10 in credits are unlocked in one week (after they make a purchase) as long as the order isn't canceled. If you're a new customer referred by a friend, you can use your referral code immediately to get $10 off your first order of $35 or more.
With each referral, you earn ten credits, which is the equivalent of $10! One credit = $1.
For every new customer, you refer, you will earn a $10 credit to apply toward any Thinx Inc. purchase (Thinx for All Leaks, Thinx, or Thinx Teens). So, if you refer three new customers, you'll have $30 to spend. You can use your credits all at once or split your credits across orders until you use all credits.
Yes — you can earn up to $500 in Thinx inc. credit by referring up to 50 friends. After that, your friends who are new customers will keep receiving $10 promo codes but you will not accrue any more credits on your account.
You can only refer new customers.
No, you can refer as many people as you want, so refer away!
Unfortunately, if your referral cancels their order, you won’t receive the $10 credit.
If you are the referrer, you can stack your referral credits with up to one discount code and use an unlimited amount of gift cards. If you are the referee, your code is not stackable with other promo codes.
Yep! At checkout, you can decide how many credits you want to apply to your order. You can apply them all at once or just use some of them and save the rest for later.
Yes! You can use credits toward any Thinx Inc. product (Thinx for All Leaks, Thinx, or Thinx Teens), including merch!
Our referral program, FriendBuy, is accepted in most countries.
No, credits are calculated in USD and not converted to other currencies due to limitations with our partner, FriendBuy. If you select your local currency from the currency dropdown, the prices onsite will be reflected in that currency, but your credits will be USD.
No, credits don’t expire!
Our referral program is one way for you to spread the Thinx Inc. love! If you refer a friend, they get $10 to spend on any Thinx Inc. product (Thinx for All Leaks, Thinx, or Thinx Teens). If they make a purchase, you also get $10 in credits. You can earn up to $500 in Thinx inc. credit by referring up to 50 friends. To get started, sign up or log in to your account. Share your unique referral link directly or through email, SMS, WhatsApp, or Facebook!
If you’re referring a friend, your $10 in credits are unlocked in one week (after they make a purchase) as long as the order isn't canceled. If you're a new customer referred by a friend, you can use your referral code immediately to get $10 off your first order of $35 or more.
With each referral, you earn ten credits, which is the equivalent of $10! One credit = $1.
For every new customer, you refer, you will earn a $10 credit to apply toward any Thinx Inc. purchase (Thinx for All Leaks, Thinx, or Thinx Teens). So, if you refer three new customers, you'll have $30 to spend. You can use your credits all at once or split your credits across orders until you use all credits.
Yes — you can earn up to $500 in Thinx inc. credit by referring up to 50 friends. After that, your friends who are new customers will keep receiving $10 promo codes but you will not accrue any more credits on your account.
You can only refer new customers.
No, you can refer as many people as you want, so refer away!
Unfortunately, if your referral cancels their order, you won’t receive the $10 credit.
If you are the referrer, you can stack your referral credits with up to one discount code and use an unlimited amount of gift cards. If you are the referee, your code is not stackable with other promo codes.
Yep! At checkout, you can decide how many credits you want to apply to your order. You can apply them all at once or just use some of them and save the rest for later.
Yes! You can use credits toward any Thinx Inc. product (Thinx for All Leaks, Thinx, or Thinx Teens), including merch!
Our referral program, FriendBuy, is accepted in most countries.
No, credits are calculated in USD and not converted to other currencies due to limitations with our partner, FriendBuy. If you select your local currency from the currency dropdown, the prices onsite will be reflected in that currency, but your credits will be USD.
No, credits don’t expire!
Thanks for your interest in selling our products! Unfortunately, we’re not accepting any new wholesale accounts at this time. To be notified, should anything change in the future, fill out our wholesale inquiry form.
Yes, we have both! To partner with us, apply with our Thinx Affiliate Program via Pepperjam. Affiliates are mainly self-sufficient and promote Thinx on their platforms, with minimal effort to participate. If you love talking about Thinx and all things menstruation as much as we do, join our community by becoming a Thinx Leader! Leaders are engaged members of our community and true advocates of our brand who use their platforms and resources for content creation and have a two-way relationship with the Thinx team.
Leaders are our most dedicated Thinx users and community members who are committed to sharing the innovation of Thinx, Inc. They’re content creators, community leaders, taboo busters, moms, eco warriors, healthcare professionals, and students, preferably with an online presence. If not, we’d love to hear about your offline communities, too!
Leaders receive personalized links to share with their audience across social media channels when they participate in Leader Program campaigns — we will provide social media guidelines and an onboarding kit once you join!
To get started, visit our Leaders Page and fill out your details. Someone on our team will reach out to share more about the program with you and take it from there.
All Leaders make commission on every order that comes in through them. The $$$ is a sliding scale, depending on your sales volume.
Nothing!
Nope! We will send you samples if you request. We suggest sending all your prospective buyers to your personalized URL.
We don’t dictate how often you post. You can post about us as much as you’d like on your schedule! We suggest at least one post per month, preferably on Instagram Stories (or other linkable content forms, like a Youtube video or blog post), so that your audience is familiar with the Thinx brand.
You can turn this opportunity into a side hustle! Some Leaders make a hundred dollars a month, while some Leaders make 10x that or more. It depends on what you put out and how often.
Thanks for your interest in selling our products! Unfortunately, we’re not accepting any new wholesale accounts at this time. To be notified, should anything change in the future, fill out our wholesale inquiry form.
Yes, we have both! To partner with us, apply with our Thinx Affiliate Program via Pepperjam. Affiliates are mainly self-sufficient and promote Thinx on their platforms, with minimal effort to participate. If you love talking about Thinx and all things menstruation as much as we do, join our community by becoming a Thinx Leader! Leaders are engaged members of our community and true advocates of our brand who use their platforms and resources for content creation and have a two-way relationship with the Thinx team.
Leaders are our most dedicated Thinx users and community members who are committed to sharing the innovation of Thinx, Inc. They’re content creators, community leaders, taboo busters, moms, eco warriors, healthcare professionals, and students, preferably with an online presence. If not, we’d love to hear about your offline communities, too!
Leaders receive personalized links to share with their audience across social media channels when they participate in Leader Program campaigns — we will provide social media guidelines and an onboarding kit once you join!
To get started, visit our Leaders Page and fill out your details. Someone on our team will reach out to share more about the program with you and take it from there.
All Leaders make commission on every order that comes in through them. The $$$ is a sliding scale, depending on your sales volume.
Nothing!
Nope! We will send you samples if you request. We suggest sending all your prospective buyers to your personalized URL.
We don’t dictate how often you post. You can post about us as much as you’d like on your schedule! We suggest at least one post per month, preferably on Instagram Stories (or other linkable content forms, like a Youtube video or blog post), so that your audience is familiar with the Thinx brand.
You can turn this opportunity into a side hustle! Some Leaders make a hundred dollars a month, while some Leaders make 10x that or more. It depends on what you put out and how often.
Can’t find what you are looking for or have more questions?