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Your cart is empty. Introducing the most absorbent period underwear ever, up to 8 tampons worth. Switch from relying on disposable menstrual products to wearing incredibly comfortable and machine-washable high-waisted postpartum and period underwear that will protect you every day of your cycle.
The gusset is our built-in liner that absorbs up to 8 tampons worth of liquid and is 22 cm long in this underwear style. It’s quick-drying, bulk-free, and the top layer next to the skin is made with modal seaweed fabric.
Knix created Leakproof Underwear as a sustainable alternative to your usual monthly single-use pad and tampon routine. With different absorbency levels that help reduce your period footprint, Leakproof Underwear is an eco-friendly and reusable replacement for disposable period products.
It’s time that all of us lived unapologetically free. Free from judgment. Free from self-doubt. Free to be yourself. That’s why all our products, from the most comfortable wireless bras to super-absorbent underwear, are designed to make you feel more comfortable in your own skin. Using patented technology, cutting-edge processes, and human-centric design, we're creating products unlike anything you’ve ever worn. Whether it’s lightweight anti-chafing shorts, wireless bras that are sexy and supportive, or overnight period protection, we want you to be able to find something that transforms how you feel.
At Knix, we aim to empower people and reduce environmental degradation by taking into consideration our impacts throughout production, transportation and consumption. Although we don’t have all of the answers yet, we believe that making progress is better than waiting for perfection. We are transforming an underwear market that had too much frill and not enough function, so you can always feel your best at any stage of life.
Greg E
Reviewed in the United States on May 6, 2025
Better than I thought..won't go without them
dominga caravalho
Reviewed in the United States on May 5, 2025
Should be a little more thicker to protect more
Patty Wessner
Reviewed in the United States on May 26, 2025
True to size and comfortable. Worth the extra money! Held up well after numerous washes - let air dry can go through dryer but wanted mine to last a long time.No worries about soiled clothing due to minor leakage and these work without bulky appearance. Super comfortable overall
Jennifer R. Welty
Reviewed in the United States on May 21, 2025
I ordered the set of 3 and was one in the package. So frustrating!
Tracy(AZ)
Reviewed in the United States on May 13, 2025
Great product you could wear everyday.
shaunaleee
Reviewed in Canada on January 30, 2025
I have been using these underwear for years! They are super comfortable, seamless and have saved me (and my clothes) several times! Totally recommend! I am size 10-12 and the Large fit perfectly.
Rebecca Bumgardner
Reviewed in the United States on April 30, 2025
60000/10 will never get a different brand
Sis
Reviewed in the United States on April 17, 2025
Yes I love the items I bought. They do what I want them to do. Great
Mel
Reviewed in the United States on April 15, 2025
Fantastic fit and got the job done! Look and feel like real panties. Didn’t shrink in the wash.
Rosaria B.
Reviewed in Canada on December 7, 2024
Great fit and do what they sayHappy
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