Modern Period Protection
We believe that quality period and leak care should be accessible to all women. That's why we created Unders®: affordable, reusable period and leakproof underwear that looks and feels like regular underwear.
find your flow

holds up to 1 regular tampon


holds up to 2 regular tampons


holds up to 5 regular tampons


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

find us in store

peace of mind is closer than you think

you have questions, we have answers
Unders® undies look and feel just like normal undies but have built-in, leakproof technology.

Our patented Leak-Loc® technology has multiple layers that draw in moisture and help lock in leaks. The Quick-Wick liner helps pull moisture away from the body and into the super absorbent core.

Our undies are designed to fight odor, helping you to feel fresh and dry. Plus, our styles are machine washable and reusable, and can be worn as normal undies.
All Unders® undies feature our specially-crafted leak protection – the higher the absorbency, the more layers of protection!

Here’s a quick absorbency breakdown:

- Light: Holds up to 1 regular tampon or 2 teaspoons

- Regular: Holds up to 2 regular tampons or 6 teaspoons

- Heavy: Holds up to 5 regular tampons or 8 teaspoons
You can buy Unders® at some of your favorite in-store retailers.

To find Unders® in a store near you, use our store locator tool above.

One of the biggest benefits of switching to Unders® is that leakproof undies are machine washable and reusable, so you can wear them again and again.
Unders® 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.

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 Unders® undies as a backup to a menstrual cup or tampon.