Leakproof Underwear

Shop the most absorbent, machine-washable, and comfortable leakproof period underwear. And enjoy worry-free protection from periods, pee, and sweat.

Leakproof Boyshort
Medium Absorbency
$23 USD Buy 3 Save 25%
Rated 4.7 out of 5
2380 Reviews
Leakproof High Rise
Medium Absorbency
$28 USD Buy 3 save 25%
Rated 4.7 out of 5
1248 Reviews
Leakproof Bikini
Medium Absorbency
$23 USD Buy 3 Save 25%
Rated 4.6 out of 5
2254 Reviews
Leakproof Thong
Light Absorbency
$23 USD Buy 3 Save 25%
Rated 4.7 out of 5
856 Reviews
Leakproof Cheeky
Medium Absorbency
$23 USD Buy 3 Save 25%
Rated 4.6 out of 5
424 Reviews
New!
Super Leakproof Boyshort
Super Absorbency
$30 USD Buy 3 Save 25%
Rated 4.7 out of 5
299 Reviews
New!
Super Leakproof Bikini
Super Absorbency
$30 USD Buy 3 Save 25%
Rated 4.7 out of 5
202 Reviews
New!
Super Leakproof Thong
High Absorbency
$30 USD Buy 3 Save 25%
Rated 4.6 out of 5
103 Reviews
New!
Super Leakproof Cheeky
Super Absorbency
$30 USD Buy 3 Save 25%
Rated 4.4 out of 5
87 Reviews
New!
Super Leakproof High Rise
Super Absorbency
$35 USD Buy 3 Save 25%
Rated 4.7 out of 5
244 Reviews
Comes in 3 Styles
Heavy Flow Period Kit
High - Super Absorbency
-
From $125 USD Save Over 25%
Rated 5.0 out of 5
1 Review
Comes in 3 Styles
Mixed Flow Period Kit
Medium - Super Absorbency
-
From $115 USD Save Over 25%
Rated 5.0 out of 5
1 Review

Period Underwear - Because We Bleed

Stop relying on disposables and switch to beautiful, reusable, and comfortable period underwear. Whether you have a light flow or a heavy flow, we’ve designed protection that’s there for you throughout your whole cycle.

Incontinence Underwear - Sometimes We Pee A Little

Sneeze, jump, or giggle without a care! Knix leakproof undies were created so you can get back to enjoying life and not worry about light bladder leaks.

Sweat-Proof Underwear - Perfect for the Gym

Stay fresh and dry during your sweatiest of sweat sessions with our moisture-wicking, anti-odor and quick dry technology. And seamless design makes them invisible under leggings. Win, win.

It's time to switch to Leakproof Underwear

Knix Leakproof Period Underwear FAQs

Super Leakproof Technology