• 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
  • 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 3-in-1 tech works
illustration of a droplet on top of three fabric squares
3-in-1​
Specially designed to absorb periods, a little pee, and sweat​.
illustration of droplet surrounded by a circle with an arrow at one end
leakproof
Leakproof for up to 12 hours for moderate periods or light bladder leaks​
illustration of a bloomed flower
fresh & dry
Helps you stay fresh, dry, and confident, whatever happens down there​

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 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.

 get more answers

how our leakproof period underwear works

Learn the magic behind our leak-absorbing technology.

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