your period underwear destination

Really (really) leakproof underwear designed by women who have your back
worry-free periods have arrived
Really (really) leakproof underwear designed by women who have your back
keep going while you're flowing
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the essentials collection
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Seamless, sleek, lightweight
Your full coverage go-to
high-rise brief
Modest coverage & ultra-comfy
extra coverage, perfect for sleep

our triple-patented leak-loc® technology

Comfortable fit

Buttery-soft stretch fabric with a super-slim lining


Designed with our patented Leak-Loc® technology


Absorbent multi-layer core locks in moisture and helps protect from leaks


Absorbent layers designed to fight odor

keeps you dry

Moisture-wicking liner pulls wetness away from the body to help you feel dry

you have questions, we have answers
Proof® undies are equipped with a moisture-wicking lining that helps fight odors.

If you want, simply add a few drops of vinegar or tea tree oil to your washing machine during the rinse cycle and complete washing as normal.
Proof® period undies were designed to handle even the heaviest of flows.

The Hipster features our super-absorbent core that holds up to 5 regular tampons and front-to-back protection—great for overnight!

Other heavy flow favorites: The Bikini and The Mesh Hipster.

Depending on your chosen absorbency level, our leak-resistant and leakproof styles can hold anywhere from 1 light tampon to 5 regular tampons' worth of liquid.

You may also feel more comfortable using Proof® undies as a backup to a menstrual cup or tampon.
Proof® undies should be washed gently. Simply toss in the washing machine on a delicate cycle using cold water and mild detergents. Hang or lay flat to dry.
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