The patented technology built into Knix underwear locks in moisture helps get rid of odor and stops leaks. Moisture Wicking, Anti-Odor Cotton Layer: Cotton is a natural and breathable fabric. It wicks away moisture and is anti-odor so you can be confident all day long (no need to worry about period underwear smell.)

Our Leakproof Underwear features triple layer technology that ensures you stay fresh, dry, and protected. The anti-odor top layer wicks away moisture from your skin; the inner-layer absorbs the liquid and locks it in; and the leak resistant outer layer keeps any liquid from spotting your clothes.

Knix are made with a mix of fabrics, including nylon, Lycra, cotton and spandex.

If you're a Knix customer (or thinking of trying our period underwear), the care instructions couldn't be simpler: Machine wash cold with mild detergent. Do not bleach. For Super Leakproof styles, tumble dry on low.

Joanna Griffiths launched Knix with the goal of transforming an underwear market that had too much frill and not enough function. A trailblazer with the creation of Leakproof Underwear, she continues to focus on listening to what people want and bringing revolutionary solutions to life.

Knix leakproof swimwear features the same Patented Leakproof Technology as our Period Underwear with an additional thin layer of waterproof material for extra protection. The inner layers absorb the blood and trap it, so there's no leakage when you swim.

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

Absorbing up to 3 tsp of liquid or 2 tampons, Knix's medium absorbency undies are available in a variety of styles, like our classic Bikini and Boyshort. These are perfect to wear solo on medium flow days, or for your entire cycle if your flow is typically on the lighter side.

cotton Instead, the gusset of Knix underwear features a fabric made of cotton, woven with carbon and spandex that contains microscopic holes in it that make it extra absorbent. “People tend to think that all period underwear is made the same way, but it's not,” she says.

cotton Their leakproof underwear is designed very similarly to their regular line - both are seamless, the body is made from nylon and Lycra, the only difference is that the leakproof pair has a lined crotch (also known as a gusset), which is 86% cotton.

Despite its name Disposable Underwear does not need to be thrown away after a single use if it is made from cotton. It can be reused and can be washed several times either by hand or machine washed on a low heat.

Depending on what type of period underwear you have and where you are in your cycle, you might be able to wear a pair of period underwear all day. You can usually buy heavy, medium, or light flow versions of most period underwear.