Period Better with
Thinx (BTWN)

Our undies are made with organic cotton and our signature period-proof tech. Depending on your flow (light, medium, heavy), you can wear them alone or with other period products for extra protection.

Period-Proof Tech

Every pair of Thinx (BTWN) is made with our signature leak-fighting technology to keep you fresh ‘n’ dry.

1. Moisture-Wicking Cotton

Draws away wetness and dries fast

2. Odor-Trapping Lining

Locks in smells so you feel fresh all day long

3. Super-Absorbent Fabric

Soaks up fluids without feeling bulky

4. Leak-Resistant Barrier

Keeps your clothes (& sheets & everything else) stain-free

How Do You Use Them?

On your light days, wear the undies instead of pads and panty liners. On your heavy days, wear ‘em as a backup to other products for extra protection.

Watch this vid to see how Thinx (BTWN) period-proof tech absorbs fluids while keeping you fresh and dry — goodbye leaks, hello freedom!

Rinse & Reuse

Thinx (BTWN) are machine washable, reusable, and simple to care for — just don’t use fabric softener, bleach, or irons!

Rinse first
Cold wash on laundry day
Hang dry


( Q )
Do Thinx (BTWN) get bulky or feel wet?
( A )
No! Our signature period-proof tech is lightweight but super-absorbent — so it won’t bulk up while keeping you protected. The tech is also moisture-wicking, so you always feel fresh and dry.
( Q )
How much does Thinx (BTWN) hold?
( A )
Each pair holds up to 3 teaspoons. Use as a replacement on lighter days, or wear as a back up on heavier days for extra protection. We *always* suggest you try Thinx (BTWN) at home first to understand how it works for your body and your period.
Got more Qs? We’ve got you covered.

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