Designed with a comfy, workout-friendly fit — so you can period better *and* move better.

The only period-proof underwear. Because every person with a period deserves peace of mind. Learn more!

Thinx

Sport

Size

Color

Underwear & Bras

Our throwback style with a chic mesh upgrade. Heavy absorbency.

Hi-waist

A barely-there fit for lighter days. (Yes, you *can* wear a thong on your period.)

Thong

Thongs

True to its name — a booty-flattering style with a seamless fit.

Cheeky

Our original best-selling pair — with a full-coverage fit and a comfy lace waistband.

Hiphugger

Like your favorite pair of sweats, but cuter! Our comfy, relaxed fit in cozy organic cotton.

Cotton Brief

Briefs

A comfy, full-coverage fit in organic cotton — now with 2x the absorbency of our classic collection.

Super Cotton Brief

Our original best-selling style — now with 2x the absorbency of our classic collection.

Super Hiphugger

A cozy, full-coverage style with a little extra length in the leg.

Boyshort

A simple fit with a slightly higher rise — in cozy organic cotton.

Cotton Bikini

From day one to day whenever, stay covered all cycle long with the All Cycle Long Set — a mix of 3 Hiphuggers in every absorbency. Wear air on your light to moderate days, Super on your heaviest days, and Classic for anywhere in between.

All Cycle Long Set

Our throwback style upgraded with a modern mesh and 2x the absorbency.

Super Hi-waist

Our best-selling style — made from an ultra-thin micromesh that keeps you cool, fresh, and dry.

Air Hiphugger

A barely-there fit for lighter days — in cozy organic cotton.

Cotton Thong

Add a little ~romance~ to your underwear drawer with three moody-hued Hiphuggers.

After Dark Set

Our comfy, workout-ready fit — made from an ultra-thin micromesh that keeps you cool, fresh, and dry.

Air Bikini

Comfy, relaxed, & breathable — keep it *au naturale* with a set of our organic cotton undies.

Organic Cotton Set

With a comfy high cut leg and extra secure elastic, this dramatic silhouette gives you more room to move. Plus, we love the undoubtedly 80’s vibe.

French Cut

Don’t let the cold *or* the patriarchy freeze you out! Stay warm and inspired with 100% all natural wool and a bold statement of gender equality.

Féministe Beret

Wondering where to start? Our Cotton Starter Set is the comfiest, softest way to period. Wear Cotton Brief on your moderate days and Super Cotton Brief on your heavy days.

Cotton Starter Set

An easy, wear-’em-with-anything set of our best-selling Hiphugger undies.

Back-to-basics Set

New to Thinx? You can never go wrong with the classics! Our Classic Starter Set comes with one Hiphugger and one Super Hiphugger, our fan favorites *and* most absorbent styles. Wear Hiphugger on moderate days and Super on heavy days.

Classic Starter Set

Our best-selling style in our best-selling color, Black! The Super Essentials Set features 3 comfy Hiphuggers that hold up to 5 regular tampons’ worth.

Super Essentials Set

Our best-selling style in our best-selling color. The Essentials Set features 3 comfy Hiphuggers — loved for their full-coverage fit and lace waistband — in classic Black.