Be Free to Flow

We’ve got you covered from your lightest to your heaviest day. Learn more about our absorbency levels below!

Shop by Flow Below
Absorbent Zones

Our technology features absorbent layers that have you covered from your super light days to your heaviest, and every day in-between.

  • regular protection

    A multi-layer leakproof absorbent core that features our Leak-Loc® bonded edge technology.

  • Extended protection

    Front-to-back lining featuring an additional waterproof layer for maximum protection. A multi-layer leakproof absorbent core with our Leak-Loc® bonded edge technology.

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.