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Frequently Asked Questions
How it works
Thinx Teens undies absorb your flow, control odor, wick moisture, and prevent leaks — so you can feel fresh, dry, and comfy! No pads, tampons, or other period products needed. Check out our Product Info page to — you guessed it — learn more about how Thinx Teens work! And if you want to learn more about how *periods* work, we’ve got a page for that, too.
Each pair holds up to 5 regular tampons’ worth of flow, which is the equivalent of 2.5 pads (45mL). For some flows, Thinx Teens™ will last all day, no other period products needed!
Because every period is different, it varies! To find out what works best for you, we recommend trying Thinx Teens at home first, especially if you’re still getting to know your period. If the underwear starts to feel bulky, wet, or if you notice your flow spreading to the seams, these are signs that it’s time for a fresh pair!
Depending on your flow, you may need to pack an extra pair of Thinx Teens to get through the day — no big deal! Our undies are lightweight and easy to store, so an extra pair will fit perfectly in any backpack or gym bag. We suggest bringing along a resealable bag, pouch, or wet bag — so that you can put your used pair of Thinx Teens away until you get home.
Nope. The interior of the Thinx Teens underwear is lined with black fabric, so you never look down and see period stains.
Yes! Our period underwear is machine washable and reusable! Just wash on cold and hang up to dry!
Yup! Thinx Teens sustainable period underwear can be worn alone — no other period products are required. If you feel more comfortable wearing them as back-up protection to other period products, go ahead! Wear them however you prefer, but we *always* suggest you try Thinx Teens at home first to understand how it works for your body and your period.
Thinx Teens are designed to fit close to the body to help prevent period leaks and stains. If you put a pad or pantyliner on top of your Thinx Teens, the gusset won’t be close enough to the body to absorb your period. For folks who usually wear pads and pantyliners, we recommend wearing + changing a couple pairs of Thinx Teens throughout the day, depending on how heavy your flow is (without any other products). Folks who like to wear tampons can wear Thinx Teens as a backup since tampons don’t take up space outside the body, but again, no other period products are needed in order to protect you from leaks!
Purchasing one of our Fresh Start Period Kits is a great way to have multiple pairs on hand, but some people start with just 1 pair and wash them throughout their cycle (daily). Ultimately, it’s up to you on how you want to use Thinx Teens — do what’s best for your lifestyle + flow.
Yes! Our underwear have a moisture-wicking layer that draws away wetness and neutralizes odors. Plus, they are super-absorbent and breathable so you always feel fresh and dry.
Our undies are built with various layers of fabric that wick away moisture quickly and control odor — leaving you feeling fresh and dry.
They’re super easy to care for. Toss them in a normal load of laundry on a delicate cycle — the other clothes will be fine! (No bleach or fabric softener.) Be sure to hang dry after washing, since the heat from the dryer and irons hurts the undies’ elasticity, which helps keep leaks in. (And if you accidentally dry them once or twice, it’s not the end of the world.) Check out the full care instructions here.
We don’t recommend using these undies as a swimsuit because we can’t guarantee the period absorbency will work in the water.
Here’s the fabric breakdown for all of our styles: body: 95% cotton, 5% elastane; gusset: 100% polyester. The underwear is made with cotton, so only natural fiber touches the most sensitive areas.
Our underwear is consciously crafted in Sri Lanka, at an award-winning factory that prioritizes sustainability, work/life balance, and female leadership.
Some retailers offer Thinx Teens in stores and you can always buy Thinx Teens directly from our website!
Our undies are machine washable, reusable, and absorbent — there’s *a lot* of science and development that goes into making them, and making sure they last. Disposable products can only be used once, but Thinx Teens can last up to 2 years — that means over time you can save serious $$$ while being eco-friendly!
All Thinx Teens undies are full-coverage, provide maximum absorbency across all styles, and are specifically designed for younger bodies and early periods. On the other hand, Thinx offers a range of styles for adults who know their flow and can pick their perfect fit from a range of styles + absorbencies.
No! Our absorbent underwear is lightweight but super-absorbent — so it won’t bulk up while keeping your tween or teen protected. The fabric is also moisture-wicking, so they'll always feel fresh and dry.
For some flows, our 5 regular tampons' worth absorbency undies can last between 8 - 12 hours. But every period is different. We suggest you try Thinx Teens at home first to understand how it works for you. You should change into a fresh pair of undies if you feel any consistent dampness or notice your flow spreading to the seams.
Thinx Teens undies absorb your flow, control odor, wick moisture, and prevent leaks — so you can feel fresh, dry, and comfy! No pads, tampons, or other period products needed. Check out our Product Info page to — you guessed it — learn more about how Thinx Teens work! And if you want to learn more about how *periods* work, we’ve got a page for that, too.
Each pair holds up to 5 regular tampons’ worth of flow, which is the equivalent of 2.5 pads (45mL). For some flows, Thinx Teens™ will last all day, no other period products needed!
Because every period is different, it varies! To find out what works best for you, we recommend trying Thinx Teens at home first, especially if you’re still getting to know your period. If the underwear starts to feel bulky, wet, or if you notice your flow spreading to the seams, these are signs that it’s time for a fresh pair!
Depending on your flow, you may need to pack an extra pair of Thinx Teens to get through the day — no big deal! Our undies are lightweight and easy to store, so an extra pair will fit perfectly in any backpack or gym bag. We suggest bringing along a resealable bag, pouch, or wet bag — so that you can put your used pair of Thinx Teens away until you get home.
Nope. The interior of the Thinx Teens underwear is lined with black fabric, so you never look down and see period stains.
Yes! Our period underwear is machine washable and reusable! Just wash on cold and hang up to dry!
Yup! Thinx Teens sustainable period underwear can be worn alone — no other period products are required. If you feel more comfortable wearing them as back-up protection to other period products, go ahead! Wear them however you prefer, but we *always* suggest you try Thinx Teens at home first to understand how it works for your body and your period.
Thinx Teens are designed to fit close to the body to help prevent period leaks and stains. If you put a pad or pantyliner on top of your Thinx Teens, the gusset won’t be close enough to the body to absorb your period. For folks who usually wear pads and pantyliners, we recommend wearing + changing a couple pairs of Thinx Teens throughout the day, depending on how heavy your flow is (without any other products). Folks who like to wear tampons can wear Thinx Teens as a backup since tampons don’t take up space outside the body, but again, no other period products are needed in order to protect you from leaks!
Purchasing one of our Fresh Start Period Kits is a great way to have multiple pairs on hand, but some people start with just 1 pair and wash them throughout their cycle (daily). Ultimately, it’s up to you on how you want to use Thinx Teens — do what’s best for your lifestyle + flow.
Yes! Our underwear have a moisture-wicking layer that draws away wetness and neutralizes odors. Plus, they are super-absorbent and breathable so you always feel fresh and dry.
Our undies are built with various layers of fabric that wick away moisture quickly and control odor — leaving you feeling fresh and dry.
They’re super easy to care for. Toss them in a normal load of laundry on a delicate cycle — the other clothes will be fine! (No bleach or fabric softener.) Be sure to hang dry after washing, since the heat from the dryer and irons hurts the undies’ elasticity, which helps keep leaks in. (And if you accidentally dry them once or twice, it’s not the end of the world.) Check out the full care instructions here.
We don’t recommend using these undies as a swimsuit because we can’t guarantee the period absorbency will work in the water.
Here’s the fabric breakdown for all of our styles: body: 95% cotton, 5% elastane; gusset: 100% polyester. The underwear is made with cotton, so only natural fiber touches the most sensitive areas.
Our underwear is consciously crafted in Sri Lanka, at an award-winning factory that prioritizes sustainability, work/life balance, and female leadership.
Some retailers offer Thinx Teens in stores and you can always buy Thinx Teens directly from our website!
Our undies are machine washable, reusable, and absorbent — there’s *a lot* of science and development that goes into making them, and making sure they last. Disposable products can only be used once, but Thinx Teens can last up to 2 years — that means over time you can save serious $$$ while being eco-friendly!
All Thinx Teens undies are full-coverage, provide maximum absorbency across all styles, and are specifically designed for younger bodies and early periods. On the other hand, Thinx offers a range of styles for adults who know their flow and can pick their perfect fit from a range of styles + absorbencies.
No! Our absorbent underwear is lightweight but super-absorbent — so it won’t bulk up while keeping your tween or teen protected. The fabric is also moisture-wicking, so they'll always feel fresh and dry.
For some flows, our 5 regular tampons' worth absorbency undies can last between 8 - 12 hours. But every period is different. We suggest you try Thinx Teens at home first to understand how it works for you. You should change into a fresh pair of undies if you feel any consistent dampness or notice your flow spreading to the seams.
Finding your pair
Thinx Teens should fit slightly more snug than your regular underwear to provide maximum protection from leaks. We recommend following the hip measurement, as most of our styles sit on the hips. Be sure to measure the hips at your widest point (derriere included!) Take a peek at our handy sizing chart to get the right measurements for the perfect fit.
Great news! Our Thinx line is underwear that absorbs your period, designed specifically for adults — made made with taller, curvier bodies in mind (people who have already finished puberty). Thinx offers a range of styles for adults including activewear and apparel in sizes XS-4X, with a variety of absorbency levels from 1 to 5 regular tampons’ worth to support more predictable flows.
Thinx Teens are designed specifically for teen body shapes and sizes in full-coverage styles that provide maximum absorbency, to support first and early periods, which can be uneven and inconsistent.
Thinx Teens should fit slightly more snug than your regular underwear to provide maximum protection from leaks. We recommend following the hip measurement, as most of our styles sit on the hips. Be sure to measure the hips at your widest point (derriere included!) Take a peek at our handy sizing chart to get the right measurements for the perfect fit.
Great news! Our Thinx line is underwear that absorbs your period, designed specifically for adults — made made with taller, curvier bodies in mind (people who have already finished puberty). Thinx offers a range of styles for adults including activewear and apparel in sizes XS-4X, with a variety of absorbency levels from 1 to 5 regular tampons’ worth to support more predictable flows.
Thinx Teens are designed specifically for teen body shapes and sizes in full-coverage styles that provide maximum absorbency, to support first and early periods, which can be uneven and inconsistent.
Periods 101
Your period is one phase of your menstrual cycle, which in total typically lasts 21 to 45 days. The ~flow~ of blood and tissue you experience (your period!) happens about halfway through that cycle. Roughly once a month, beginning at puberty, your body prepares for an egg to be fertilized (possible pregnancy). During this time, the lining of your uterus thickens around the egg. When you don’t become pregnant, your body sheds the built up lining of the uterus that it no longer needed and releases the unfertilized egg. This is referred to as menstruation, or what we call a “period" — menstrual blood and tissue flow from your uterus through the small opening in your cervix and pass out of your body through your vagina.
*Every body* is different, and it’s no big deal to get your period before or after your friends. Some people get their first period as early as 8 or 9 years old, others get them as late as 16. First periods often happen around the same time in life for people who are related to one another, so if you can, ask someone related to you with a period when they got theirs to get some idea of when you’ll get yours.
Ovulation refers to the phase of your cycle when an egg is released from the ovaries. Pregnancy occurs when an egg is fertilized by sperm. When an egg isn't fertilized by sperm, your body sends the signal that you're not pregnant and begins getting ready to shed the uterine lining. A couple weeks after ovulation, you'll get your period, which is how your body naturally flushes out blood, mucus, and tissue out of your cervix. This cycle repeats itself every month.
*Every body* is different! You may feel a little wetness (more than usual vaginal discharge) or you may not feel your period flow at all, instead you’ll just notice some color on your undies.
The amount of time you’ll bleed every month can vary from 3 to 7 days, but it’s normal for your period to vary a little from cycle to cycle. If you notice blood for longer than 7 days, it’s a good idea to check with your doctor to make sure everything is okay.
Every period is unique. Many things can affect the frequency in which you get your period such as stress, hormones, pregnancy, or even medications such as birth control, but the average period occurs monthly or every 28 days. Some cycles can even be longer or shorter than this –– which is normal too! You can always check with your doctor if you think something is amiss with your cycle.
On average, you lose 2 to 7 teaspoons of menstrual fluid while on your period. That might seem like a lot, especially when you're changing your period products, but that's because menstrual fluid is made up of a bit more than just blood. Menstrual fluid is actually a combination of blood and tissue from your uterine lining, which is also why you might notice clots or other textures that differ from a regular cut. If you’re ever concerned that you’re losing too much menstrual fluid, check-in with your doctor to make sure everything is okay, or ask an adult to help you set up an appointment.
Periods come in all different colors and textures — some are more red and liquidy, others may be brown and clumpy. Brown blood is just blood that’s a bit older. Some people notice brown blood before they see red (on or before day 1), others have brown blood at the end of their period (day 5, or whenever your period ends). If you’ve just started your period, you may only see brown stuff, and that’s totally normal.
Periods are different for *every body* and yours can even be different from cycle to cycle. You may start with a light flow, have heavy days in the middle, and finish off with a light flow; or have heavy flows at the beginning and then lighter days only at the end; or something else! You’ll get to know *your* flow over time and understand what heavy, moderate, and light days mean for you.
Absolutely! You can do *anything* on your period—swim, dance, wear white pants, go camping, whatever — you may just want to use different period products depending on the activity. However, we don't recommend using our products underwater.
Your period is just one phase of your menstrual cycle, which in total typically lasts 21 - 45 days. The ~flow~ of blood and tissue you experience (your period!) happens about halfway through that cycle.
PMS stands for premenstrual syndrome and it’s often defined by symptoms you may feel, physically and emotionally, before you get your period. PMS symptoms can include cramps, sore boobs, laziness, moodiness, or an appetite for certain foods (we *always* crave pizza!). A lot of times, PMS symptoms show up a few days before your flow starts and can be helpful signs to let you know to wear your Thinx Teens in preparation for what’s to come.
Periods are 100% normal and nothing to be ashamed about! It may feel super-awkward, but it doesn’t have to be. For some it’s easy to blurt this kinda stuff out, others find it is easier to write a note or send a text. Your friends or any adults you trust can be a helpful support system when you need assurance or advice.
Who you decide to share your period with is your choice, but in many cases sharing with someone you trust is helpful and can lead to some really awesome tips on what products to use and how to feel better if you have PMS symptoms. Periods are nothing to be ashamed of or hide!
We’re so glad you asked! Not all bodies experience periods, only bodies with uteruses. These bodies produce certain hormones (naturally-occurring chemicals in our bodies) that make a menstrual cycle happen, which is a fancy way of saying that they make a period happen. Bodies without uteruses (such as bodies with penises) don’t experience periods because they don’t have a uterus.
Periods begin at puberty, between the ages of 8 and 16. and last until you enter what’s called menopause. This happens for most people between the ages of 45 and 55, and, like your period, menopause will come with some new physical and emotional changes. Fun, we know!
Your period is one phase of your menstrual cycle, which in total typically lasts 21 to 45 days. The ~flow~ of blood and tissue you experience (your period!) happens about halfway through that cycle. Roughly once a month, beginning at puberty, your body prepares for an egg to be fertilized (possible pregnancy). During this time, the lining of your uterus thickens around the egg. When you don’t become pregnant, your body sheds the built up lining of the uterus that it no longer needed and releases the unfertilized egg. This is referred to as menstruation, or what we call a “period" — menstrual blood and tissue flow from your uterus through the small opening in your cervix and pass out of your body through your vagina.
*Every body* is different, and it’s no big deal to get your period before or after your friends. Some people get their first period as early as 8 or 9 years old, others get them as late as 16. First periods often happen around the same time in life for people who are related to one another, so if you can, ask someone related to you with a period when they got theirs to get some idea of when you’ll get yours.
Ovulation refers to the phase of your cycle when an egg is released from the ovaries. Pregnancy occurs when an egg is fertilized by sperm. When an egg isn't fertilized by sperm, your body sends the signal that you're not pregnant and begins getting ready to shed the uterine lining. A couple weeks after ovulation, you'll get your period, which is how your body naturally flushes out blood, mucus, and tissue out of your cervix. This cycle repeats itself every month.
*Every body* is different! You may feel a little wetness (more than usual vaginal discharge) or you may not feel your period flow at all, instead you’ll just notice some color on your undies.
The amount of time you’ll bleed every month can vary from 3 to 7 days, but it’s normal for your period to vary a little from cycle to cycle. If you notice blood for longer than 7 days, it’s a good idea to check with your doctor to make sure everything is okay.
Every period is unique. Many things can affect the frequency in which you get your period such as stress, hormones, pregnancy, or even medications such as birth control, but the average period occurs monthly or every 28 days. Some cycles can even be longer or shorter than this –– which is normal too! You can always check with your doctor if you think something is amiss with your cycle.
On average, you lose 2 to 7 teaspoons of menstrual fluid while on your period. That might seem like a lot, especially when you're changing your period products, but that's because menstrual fluid is made up of a bit more than just blood. Menstrual fluid is actually a combination of blood and tissue from your uterine lining, which is also why you might notice clots or other textures that differ from a regular cut. If you’re ever concerned that you’re losing too much menstrual fluid, check-in with your doctor to make sure everything is okay, or ask an adult to help you set up an appointment.
Periods come in all different colors and textures — some are more red and liquidy, others may be brown and clumpy. Brown blood is just blood that’s a bit older. Some people notice brown blood before they see red (on or before day 1), others have brown blood at the end of their period (day 5, or whenever your period ends). If you’ve just started your period, you may only see brown stuff, and that’s totally normal.
Periods are different for *every body* and yours can even be different from cycle to cycle. You may start with a light flow, have heavy days in the middle, and finish off with a light flow; or have heavy flows at the beginning and then lighter days only at the end; or something else! You’ll get to know *your* flow over time and understand what heavy, moderate, and light days mean for you.
Absolutely! You can do *anything* on your period—swim, dance, wear white pants, go camping, whatever — you may just want to use different period products depending on the activity. However, we don't recommend using our products underwater.
Your period is just one phase of your menstrual cycle, which in total typically lasts 21 - 45 days. The ~flow~ of blood and tissue you experience (your period!) happens about halfway through that cycle.
PMS stands for premenstrual syndrome and it’s often defined by symptoms you may feel, physically and emotionally, before you get your period. PMS symptoms can include cramps, sore boobs, laziness, moodiness, or an appetite for certain foods (we *always* crave pizza!). A lot of times, PMS symptoms show up a few days before your flow starts and can be helpful signs to let you know to wear your Thinx Teens in preparation for what’s to come.
Periods are 100% normal and nothing to be ashamed about! It may feel super-awkward, but it doesn’t have to be. For some it’s easy to blurt this kinda stuff out, others find it is easier to write a note or send a text. Your friends or any adults you trust can be a helpful support system when you need assurance or advice.
Who you decide to share your period with is your choice, but in many cases sharing with someone you trust is helpful and can lead to some really awesome tips on what products to use and how to feel better if you have PMS symptoms. Periods are nothing to be ashamed of or hide!
We’re so glad you asked! Not all bodies experience periods, only bodies with uteruses. These bodies produce certain hormones (naturally-occurring chemicals in our bodies) that make a menstrual cycle happen, which is a fancy way of saying that they make a period happen. Bodies without uteruses (such as bodies with penises) don’t experience periods because they don’t have a uterus.
Periods begin at puberty, between the ages of 8 and 16. and last until you enter what’s called menopause. This happens for most people between the ages of 45 and 55, and, like your period, menopause will come with some new physical and emotional changes. Fun, we know!
Caring for your undies
They’re super easy to care for. Toss them in a normal load of laundry on a delicate cycle — the other clothes will be fine! (No bleach or fabric softener.) Be sure to hang dry after washing, since the heat from the dryer and irons hurts the undies’ elasticity, which helps keep leaks in. (And if you accidentally dry them once or twice, it’s not the end of the world.) Check out the full care instructions here.
Thinx Teens undies can last up to 2 years (or longer!) if cared for properly. This means washing on cold, never using bleach or fabric softener, and hang drying!
You can recycle your period-absorbing underwear by cutting out the absorbent gusset and disposing of it. Then you can donate the remaining clean fabric in your local textile recycling bin.
Thinx Teens should not retain a scent — but if you think they need a li'l extra love, try a vinegar soak. Before you wash your undies, submerge them in a clean basin or sink with one cup of white vinegar and 1-2 cups of water. Soak for about 15 to 30 minutes, then toss 'em in the washing machine as usual.Note: If your period begins to smell different (especially fishy), that might mean something is amiss down there, and it might be a good idea to check in with your doctor.
They’re super easy to care for. Toss them in a normal load of laundry on a delicate cycle — the other clothes will be fine! (No bleach or fabric softener.) Be sure to hang dry after washing, since the heat from the dryer and irons hurts the undies’ elasticity, which helps keep leaks in. (And if you accidentally dry them once or twice, it’s not the end of the world.) Check out the full care instructions here.
Thinx Teens undies can last up to 2 years (or longer!) if cared for properly. This means washing on cold, never using bleach or fabric softener, and hang drying!
You can recycle your period-absorbing underwear by cutting out the absorbent gusset and disposing of it. Then you can donate the remaining clean fabric in your local textile recycling bin.
Thinx Teens should not retain a scent — but if you think they need a li'l extra love, try a vinegar soak. Before you wash your undies, submerge them in a clean basin or sink with one cup of white vinegar and 1-2 cups of water. Soak for about 15 to 30 minutes, then toss 'em in the washing machine as usual.Note: If your period begins to smell different (especially fishy), that might mean something is amiss down there, and it might be a good idea to check in with your doctor.
Orders, returns, and shipping
Orders ship within 1-2 business days once confirmed. To receive Next Day delivery, orders must be placed by 1pm Monday through Thursday. Check out our shipping Information page to see all of our delivery estimates by shipping type.
Once your order has shipped, we'll send you an email with your tracking number. If you placed an order under an account, you can also login to see your tracking information. Once logged into your account, under the “order history" tab, you will see all your previous and current orders and under each one there will be a "track order" button.
Our orders ship from our warehouse in the Northeast US!
Not loving your undies? No worries — we process returns and exchanges within 60 days of purchase (not valid on final sale items, merch, or gift cards), no questions asked! You can request a return or exchange via our Returns & Exchanges page where there are options to return, exchange for a different size/color, or shop for something new entirely.
Getting familiar with period products before you have to use them regularly is a great idea! Wearing Thinx Teens prior to getting your period can also help minimize anxiety around when your period starts.
Applicable local taxes, duties, and brokerage fees are included if you are shipping our undies to the EU, UK, or Canada. You will be charged VAT at checkout if shipping to the EU or UK. Unfortunately, for all other countries, our prices don't include local taxes, duties, brokerage fees, and VATs — all the stuff you may be charged to receive your Thinx Teens shipment at home. Please make sure you consider all fees before placing an order.
Yes! We offer international shipping, so people with periods all around the world can period better. Please check out the list of countries we ship to on our Shipping Information page. Rates and locations are subject to change depending on our carriers (UPSMI, UPS, and FedEx).
You can return or exchange individual pairs of undies from our Fresh Start Period Kits — or you can return or exchange the whole kit, no questions asked.
We process our orders quickly (so you can get your undies fast!), but we will do our best to accommodate any requests you may have. The best way to edit or cancel an order is to reach out to our customer service team via our Help Center!
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!
Yes, Thinx Teens and Thinx — our period underwear for adults — can now be purchased directly at check out using Flexible Spending Arrangement (FSA), Health Savings Account (HSA), and Health Reimbursement Arrangement (HRA) credit/debit cards. Speax by Thinx, our underwear for bladder leaks, may also be reimbursable. If you experience any issues with the card being declined at checkout, please check your balance — if there is enough funds in your account, you may need to contact an administrator at your plan to authorize a purchase on our site. Paypal, Afterpay, and orders processed in currencies other than USD are not eligible. If you prefer to check out using another method, you can also review your plan for details about applying for a reimbursement. Your plan may require you fill out a claim form for reimbursement with an itemized receipt, so keep your order confirmation email for the products you purchased handy.
We love our friends from all around the world, which is why we accept nearly all local currencies. On the off chance we do not accept your local currency, you’ll have the option of checking out in USD, CAD, EUR, AUD, or British Pounds. All receipts and emails will show the purchase price in USD. The currency should automatically change based on your location!
We accept all major credit cards, Flexible Spending Arrangement (FSA), Health Savings Account (HSA), and Health Reimbursement Arrangement (HRA) credit/debit cards, PayPal, Google Pay, AfterPay, and Thinx Inc. gift cards.
Some retailers offer Thinx Teens in stores and you can always buy Thinx Teens directly from our website!
We recently rebranded from Thinx (BTWN) to Thinx Teens and some items may still have the previous labels and tags. Don't worry — the product you received is exactly what you ordered on our website!
Orders ship within 1-2 business days once confirmed. To receive Next Day delivery, orders must be placed by 1pm Monday through Thursday. Check out our shipping Information page to see all of our delivery estimates by shipping type.
Once your order has shipped, we'll send you an email with your tracking number. If you placed an order under an account, you can also login to see your tracking information. Once logged into your account, under the “order history" tab, you will see all your previous and current orders and under each one there will be a "track order" button.
Our orders ship from our warehouse in the Northeast US!
Not loving your undies? No worries — we process returns and exchanges within 60 days of purchase (not valid on final sale items, merch, or gift cards), no questions asked! You can request a return or exchange via our Returns & Exchanges page where there are options to return, exchange for a different size/color, or shop for something new entirely.
Getting familiar with period products before you have to use them regularly is a great idea! Wearing Thinx Teens prior to getting your period can also help minimize anxiety around when your period starts.
Applicable local taxes, duties, and brokerage fees are included if you are shipping our undies to the EU, UK, or Canada. You will be charged VAT at checkout if shipping to the EU or UK. Unfortunately, for all other countries, our prices don't include local taxes, duties, brokerage fees, and VATs — all the stuff you may be charged to receive your Thinx Teens shipment at home. Please make sure you consider all fees before placing an order.
Yes! We offer international shipping, so people with periods all around the world can period better. Please check out the list of countries we ship to on our Shipping Information page. Rates and locations are subject to change depending on our carriers (UPSMI, UPS, and FedEx).
You can return or exchange individual pairs of undies from our Fresh Start Period Kits — or you can return or exchange the whole kit, no questions asked.
We process our orders quickly (so you can get your undies fast!), but we will do our best to accommodate any requests you may have. The best way to edit or cancel an order is to reach out to our customer service team via our Help Center!
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!
Yes, Thinx Teens and Thinx — our period underwear for adults — can now be purchased directly at check out using Flexible Spending Arrangement (FSA), Health Savings Account (HSA), and Health Reimbursement Arrangement (HRA) credit/debit cards. Speax by Thinx, our underwear for bladder leaks, may also be reimbursable. If you experience any issues with the card being declined at checkout, please check your balance — if there is enough funds in your account, you may need to contact an administrator at your plan to authorize a purchase on our site. Paypal, Afterpay, and orders processed in currencies other than USD are not eligible. If you prefer to check out using another method, you can also review your plan for details about applying for a reimbursement. Your plan may require you fill out a claim form for reimbursement with an itemized receipt, so keep your order confirmation email for the products you purchased handy.
We love our friends from all around the world, which is why we accept nearly all local currencies. On the off chance we do not accept your local currency, you’ll have the option of checking out in USD, CAD, EUR, AUD, or British Pounds. All receipts and emails will show the purchase price in USD. The currency should automatically change based on your location!
We accept all major credit cards, Flexible Spending Arrangement (FSA), Health Savings Account (HSA), and Health Reimbursement Arrangement (HRA) credit/debit cards, PayPal, Google Pay, AfterPay, and Thinx Inc. gift cards.
Some retailers offer Thinx Teens in stores and you can always buy Thinx Teens directly from our website!
We recently rebranded from Thinx (BTWN) to Thinx Teens and some items may still have the previous labels and tags. Don't worry — the product you received is exactly what you ordered on our website!
Give $10, get $10
Our referral program is a way for you to spread the love! If you refer a friend, they get $10 to spend on any Thinx, Thinx Teens, or Speax product. If they make a purchase, you also get $10 in credits. You can stack as many credits as you want and use them to get free underwear! To get started, sign up above, or login to your account. Share your unique referral link directly or through email, SMS, WhatsApp, or Facebook! To learn more about the referral program, view our Referral FAQs on the referral page.
You view the referral credit you've earned by clicking logging into your account here. If you are referring others, your credits will be unlocked after one week — unless the person you referred to has canceled their order. For more information, visit our Referral page, Give $10, get $10!
You can view your earned, pending, and redeemed credits by visiting the Referral Dashboard tab on your account page. If you are referring others, your credits will be unlocked after one week — unless the person you referred to has canceled their order.
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 anymore credits on your account.
For every new customer you refer, you will earn $10 in credit that can be used on any product of any of our brands at thinx.com. This means if you refer 3 new customers, you can spend that $30 on one pair of underwear, or split it across however many orders you’d like until it’s all spent.
With each referral, you earn ten credits, which is the equivalent of $10! One credit = $1.
Yes! Credits can be used on any of our sister brands: Thinx, period underwear; Thinx Teens, period underwear for teens; and Speax, underwear for bladder leaks.
No, the credits are calculated in USD and can’t be converted to other currencies due to limitations with our partner, FriendBuy. If you select your local currency from the currency dropdown, prices on the site will be reflected in that currency but your credits will be in USD.
If you’re being referred, you don’t need an account (but we encourage creating one so you can start referring and earning credits toward more pairs!).
You can only refer new customers.
If you’re referring others, your credits will be unlocked in one week, as long as whoever you referred has not cancelled their order.
Unfortunately, if your referral cancels their order, you won’t receive the $10 credit.
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, they can be used on any product at thinx.com.
No, credits don’t expire!
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.
No, you can refer as many people as you want, so refer away!
Our third-party partner, FriendBuy, which enables our referral program, is accepted in most countries, except for Ivory Coast, Togo, Ghana, Nigeria, China, Hong Kong, Philippines, and Russia — where FriendBuy is blocked. If you reside in one of these countries, you are unfortunately ineligible to refer or be referred by others. We're sorry about the inconvenience!
Stackable credits only apply to people doing the referring. If you are on the receiving end of a referral, your code is not stackable with other promo codes.
Our referral program is a way for you to spread the love! If you refer a friend, they get $10 to spend on any Thinx, Thinx Teens, or Speax product. If they make a purchase, you also get $10 in credits. You can stack as many credits as you want and use them to get free underwear! To get started, sign up above, or login to your account. Share your unique referral link directly or through email, SMS, WhatsApp, or Facebook! To learn more about the referral program, view our Referral FAQs on the referral page.
You view the referral credit you've earned by clicking logging into your account here. If you are referring others, your credits will be unlocked after one week — unless the person you referred to has canceled their order. For more information, visit our Referral page, Give $10, get $10!
You can view your earned, pending, and redeemed credits by visiting the Referral Dashboard tab on your account page. If you are referring others, your credits will be unlocked after one week — unless the person you referred to has canceled their order.
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 anymore credits on your account.
For every new customer you refer, you will earn $10 in credit that can be used on any product of any of our brands at thinx.com. This means if you refer 3 new customers, you can spend that $30 on one pair of underwear, or split it across however many orders you’d like until it’s all spent.
With each referral, you earn ten credits, which is the equivalent of $10! One credit = $1.
Yes! Credits can be used on any of our sister brands: Thinx, period underwear; Thinx Teens, period underwear for teens; and Speax, underwear for bladder leaks.
No, the credits are calculated in USD and can’t be converted to other currencies due to limitations with our partner, FriendBuy. If you select your local currency from the currency dropdown, prices on the site will be reflected in that currency but your credits will be in USD.
If you’re being referred, you don’t need an account (but we encourage creating one so you can start referring and earning credits toward more pairs!).
You can only refer new customers.
If you’re referring others, your credits will be unlocked in one week, as long as whoever you referred has not cancelled their order.
Unfortunately, if your referral cancels their order, you won’t receive the $10 credit.
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, they can be used on any product at thinx.com.
No, credits don’t expire!
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.
No, you can refer as many people as you want, so refer away!
Our third-party partner, FriendBuy, which enables our referral program, is accepted in most countries, except for Ivory Coast, Togo, Ghana, Nigeria, China, Hong Kong, Philippines, and Russia — where FriendBuy is blocked. If you reside in one of these countries, you are unfortunately ineligible to refer or be referred by others. We're sorry about the inconvenience!
Stackable credits only apply to people doing the referring. If you are on the receiving end of a referral, your code is not stackable with other promo codes.
Afterpay
With Afterpay, you can buy Thinx Teens today and pay for your order in 4 equal payments made every 2 weeks — no interest added.
After adding Thinx Teens to your cart, choose Afterpay at checkout as your payment method. If this is your first time using Afterpay, you'll be redirected to their website to register and give your payment details. If you've used Afterpay before, just log in to your account. Complete your order, and you're all done! Just remember — all items in your cart must be eligible for Afterpay, and the value must be between $35 and $1,000.
Afterpay can be used for all purchases at thinxteens.com — as well as our sister brands Thinx and Speax. However, it cannot be used at our retail partners or pop-up locations.
Unfortunately, no — Afterpay is only available to customers in the US. We apologize for the inconvenience!
With Afterpay, you'll be required to make your first payment at the time of your purchase. The remaining 3 payments will be deducted automatically in equal installments every 2 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 — your amount 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.
Gift cards are not eligible for Afterpay.
We offer a 60-day money-back guarantee on all purchases, including Afterpay. We cannot, however, process an exchange for a purchase made with Afterpay. If you return an item, we will refund Afterpay and the amount of the item will be deducted from the total order purchase amount owed within your Afterpay account. If you return an entire order, we will refund Afterpay and any payments you have already made toward the total purchase will be refunded via Afterpay and the remaining payments scheduled will be changed to $0.
Visit Afterpay for additional information and answers to your questions.
With Afterpay, you can buy Thinx Teens today and pay for your order in 4 equal payments made every 2 weeks — no interest added.
After adding Thinx Teens to your cart, choose Afterpay at checkout as your payment method. If this is your first time using Afterpay, you'll be redirected to their website to register and give your payment details. If you've used Afterpay before, just log in to your account. Complete your order, and you're all done! Just remember — all items in your cart must be eligible for Afterpay, and the value must be between $35 and $1,000.
Afterpay can be used for all purchases at thinxteens.com — as well as our sister brands Thinx and Speax. However, it cannot be used at our retail partners or pop-up locations.
Unfortunately, no — Afterpay is only available to customers in the US. We apologize for the inconvenience!
With Afterpay, you'll be required to make your first payment at the time of your purchase. The remaining 3 payments will be deducted automatically in equal installments every 2 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 — your amount 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.
Gift cards are not eligible for Afterpay.
We offer a 60-day money-back guarantee on all purchases, including Afterpay. We cannot, however, process an exchange for a purchase made with Afterpay. If you return an item, we will refund Afterpay and the amount of the item will be deducted from the total order purchase amount owed within your Afterpay account. If you return an entire order, we will refund Afterpay and any payments you have already made toward the total purchase will be refunded via Afterpay and the remaining payments scheduled will be changed to $0.
Visit Afterpay for additional information and answers to your questions.
About us
Thinx Inc. (Speax, Thinx, and Thinx Teens) aims 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.
Giving back to people with periods has been at the core of our mission since day 1 — but we know there’s still a lot of work to do (like more education, accessibility, and resources). That’s why we’re committed to paying it forward through GiveRise, our giveback program. When you purchase from Thinx Teens, you're helping to support our programs and initiatives at GiveRise, including the EveryBody education program — our inclusive, medically accurate, and hands-on curriculum designed to educate future generations about their changing bodies in a safe, empowered space. Want to learn more? Visit our GiveRise page!
We actively support menstrual equity through partnerships with non-profits and community-based organizations. You can read more about our GiveRise program here. If your organization is seeking a donation, please contact GiveRise@shethinx.com.
Thinx Inc. (Speax, Thinx, and Thinx Teens) aims 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.
Giving back to people with periods has been at the core of our mission since day 1 — but we know there’s still a lot of work to do (like more education, accessibility, and resources). That’s why we’re committed to paying it forward through GiveRise, our giveback program. When you purchase from Thinx Teens, you're helping to support our programs and initiatives at GiveRise, including the EveryBody education program — our inclusive, medically accurate, and hands-on curriculum designed to educate future generations about their changing bodies in a safe, empowered space. Want to learn more? Visit our GiveRise page!
We actively support menstrual equity through partnerships with non-profits and community-based organizations. You can read more about our GiveRise program here. If your organization is seeking a donation, please contact GiveRise@shethinx.com.