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You're about to enter the THINX Periodical, a blog with *adult-ish* content. Do you want to proceed?

period-proof underwear that works

Save $10 when you shop our All-Star Set: 3 best-selling styles in 1 special bundle.

You shop, we give: $5 from every pair of our *ltd edition* GRL PWR undies goes to our friends at Girls Inc. 💕

Visit our NYC pop-up store at 199 Lafayette St and shop alllll our styles — including our sister brands THINX (BTWN) & Icon. We’re here in Soho until 2/28/19! 👋

Technical enhancements + designer touches = our stronger, more durable lace in our best-selling Hiphugger.

Say hi to THINX (BTWN): our *new* line of super-absorbent underwear specially made for young people with periods. 🙋💞

On #IWD2018, we lit up United Nations HQ and demanded menstrual equity for all!

THINX can be worn as a back-up or replacement to traditional period products. Depending on your flow (light, medium, heavy), THINX can replace pads and liners or be worn with tampons and cups for extra protection.

how do
THINX work?

how do
THINX work?

Our period-proof undies hold up to 2 tampons’ worth — yet they look and feel like regular underwear.

learn more

try 'em

free shipping on 1st order w/ account

60 day money-back guarantee

no-hassle returns


Get started with a few favorites from menstruators like you!

the girl who bled a river — and it was fine

let’s period better, together

Get period inspo, see new styles, and smash the taboo with us on Instagram. Follow us @shethinx and share your experience using #THINX.

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