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period-proof underwear

now in styles that absorb up to 4 tampons’ worth

Meet our *limited edition* Holiday Party Set: A colorful 3-pair pack with styles you’ll wanna celebrate in. 🎉 Shop the set & save even more $$$.

Big news — we just dropped our special-edition collab with Ilana Glazer! Get the Hi-Waist, Cheeky, and more in a bold Crimson red.

If we all had periods, would we be more comfortable with them? Take a look at our first-ever national campaign — coming to a screen near you.

Big news! The fan-favorite Hi-Waist is now available in our smoky, dreamy hue — Dusk.

Bring some sexy back to your flow with Cleo — our new *limited edition* print in Hi-Waist and Cheeky. 🐆

2x the absorbency. 2x the protection. Meet Thinx Super — our new undies that absorb up to 4 tampons' worth of your flow. 💪

Thinx can replace or work as back-up leak protection to other period products. Depending on your flow, our undies can be worn instead of pads and liners, or to support tampons and cups.

how do
Thinx work?

how do
Thinx work?

Our period-proof undies hold up to 4 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 other people with periods!

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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