Welcome to
Thinx (BTWN)

Fresh start period kit with three styles and color underwear Young teen holding a pair of Thinx (BTWN) underwear Three girls lying on grass.

How do they work?

Thinx (BTWN) are period underwear designed with our absorbent, patented gusset that holds up to 4 regular tampons’ worth.

Learn more

Try Thinx (BTWN) for 60 days and if they don’t help you period better we’ll give you a refund — no questions asked!


( Q )
Are Thinx (BTWN) reusable?
( A )
Yes! Our period underwear is washable and reusable. Plus, they’re easy to wash, and when cared for properly can last up to 2 years.
( Q )
Are Thinx (BTWN) a replacement for other period products?
( A )
On light days, wear Thinx (BTWN) instead of pads and panty liners. On heavy days, wear ‘em as a backup to other products for extra protection.
Got more Qs? We’ve got you covered.