HSA/FSA eligible pink large circle HSA/FSA eligible light pink flower outline HSA/FSA eligible light pink half circle
HSA/FSA eligible pink large circle HSA/FSA eligible light pink flower outline HSA/FSA eligible light pink half circle
HSA/FSA eligible pink large circle HSA/FSA eligible light pink flower outline HSA/FSA eligible light pink half circle
HSA/FSA eligible pink large circle HSA/FSA eligible light pink flower outline HSA/FSA eligible light pink half circle
how our leakproof tech works
illustration of a shield with a droplet in the middle
LeakSafe™
Our LeakSafe™ barrier helps guard against leaks
dry feel
Moisture-wicking fabric helps keep you dry
odor controlling
Odor control technology helps minimize odors
illustration of a droplet on top of three fabric squares
absorbent
Absorbent layers hold up to 12 regular tampons worth

still have questions?

We have answers.
How does period underwear work?

Our underwear for periods absorbs your flow, helps control odor, wicks moisture, and helps prevent leaks — so teens 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!

How long will period-absorbing underwear help prevent leaks?

Our newest period underwear styles feature our all-day absorbency for up to 12 hours of period protection. No pads, tampons, or other period products are needed.

How do I find the right size?

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.

What's your return policy?

We offer a 45-day trial on all orders, so if you’re unhappy with your purchase, we’ll make it right. Final sale items, Thinx “merch”, and gift cards are nonrefundable. Visit our online Returns Portal to begin a return or exchange.

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how our leakproof period underwear works

Learn the magic behind our leak-absorbing technology.

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