All Underwear

Shop our collection of comfortable leakproof period underwear designed for medium and light days, light leaks, and sweat. Stay fresh and dry all day long with beautiful, machine-washable undies.

Designed to protect you through your heaviest days - and nights. Absorbs up to 6-10 tsp of liquid.

We’re making the world’s most comfortable underwear, so you can be the world’s most confident human. Seamless and smooth, and invisible under anything.

Looking for absorbent leakproof underwear? Shop Here

Moisture-wicking, odor-crushing, life-changing leakproof undies.

Full coverage styles made to match your every need.

Get all the period protection you need with Knix leakproof underwear kits. Find your perfect assortment of absorbent, comfortable, and machine-washable underwear, and enjoy worry-free protection no matter how heavy your flow.