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LEAKPROOF GUIDE

North America’s #1 Leakproof Brand

With over 10 years of innovation and 8 million+ pairs sold, Knix has solutions for you, no matter your flow. Try UltraThin, our latest huge leap forward in leakproof technology.

8+ million Leakproof Underwear sold

8+ million Leakproof Underwear sold

Why Choose Knix

Why Choose Knix

Find your absorbency level

Lightest

Absorbs about the equivalent of 0.5-1 regular tampon.

Light

Absorbs about the equivalent of 1-3 regular tampons.

Medium

Absorbs about the equivalent of 2-3 super tampons.

Heavy

Absorbs about the equivalent of 3-6 super tampons.

Ultra

Absorbs about the equivalent of 7-9 super tampons.

“It’s so nice to finally feel comfortable while having your period.”

“It’s so nice to finally feel comfortable while having your period.”

“It’s so nice to finally feel comfortable while having your period.”

Brittney

SHOP ALL LEAKPROOF

“Love these! The extra leakproof coverage is perfect for heavy days and nights!”

“Love these! The extra leakproof coverage is perfect for heavy days and nights!”

“Love these! The extra leakproof coverage is perfect for heavy days and nights!”

Eva B.

SHOP ALL LEAKPROOF

“As I go through menopause, this underwear served as great protection as I progress through unpredictable cycles.”

“As I go through menopause, this underwear served as great protection as I progress through unpredictable cycles.”

“As I go through menopause, this underwear served as great protection as I progress through unpredictable cycles.”

Nicole Mikel B.

SHOP ALL LEAKPROOF

“It’s so nice to finally feel comfortable while having your period.”

“It’s so nice to finally feel comfortable while having your period.”

“It’s so nice to finally feel comfortable while having your period.”

Brittney

SHOP ALL LEAKPROOF

“Love these! The extra leakproof coverage is perfect for heavy days and nights!”

“Love these! The extra leakproof coverage is perfect for heavy days and nights!”

“Love these! The extra leakproof coverage is perfect for heavy days and nights!”

Eva B.

SHOP ALL LEAKPROOF

Shop by silhouette

High Rise

High Rise

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Thong

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French Cut

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Boyshort

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Shorts + Boxer Briefs

Praise in the press

Women s Health MB

Women’s Health

Super Leakproof No-Show Bikini named “Best Period Underwear”

InStyle

InStyle

Ultra Leakproof Zones+ High Rise named “Best Sweat-Wicking”

People

People

Light Leakproof No-Show High Rise named “Best Period Underwear”

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