Period better with
Thinx (BTWN)

Our undies are made with organic cotton and our signature period-proof tech. Depending on your tween or teen's flow (light, moderate, heavy), Thinx (BTWN) can be worn alone or with other period products for extra leak protection.

Period-proof tech

Every pair of Thinx (BTWN) is made with our signature leak-fighting technology.

1. Wicks moisture

Draws away wetness and dries fast

2. Controls odors

Neutralizes smells, keeping everything fresh all day

3. Super absorbent

Styles hold up to 2 or 4 regular tampons’ worth — without feeling bulky

4. Prevents leaks

So clothes, sheets, and everything else stays stain-free

How do you use them?

On light days, our undies can replace pads and panty liners. On heavier days, they can be worn as a backup to other products for extra protection.

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

Rinse & reuse

Thinx (BTWN) are machine washable, reusable, and simple to care for — just don't put them in the dryer, and avoid fabric softener or bleach!

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 2 or 4 tampons depending on the style. Use as a replacement on lighter days, or wear as a back up on heavier days for extra protection. We suggest trying Thinx (BTWN) at home first to understand how it works for your tween or teen.
Got more Qs? We’ve got you covered.

Got Qs about your period?

Get the facts on how your period works, and tips on how to manage it best.

See all our super-absorbent styles

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