Period Underwear
Now with more styles and absorbencies. All of the protection, none of the bulk.
Ultra Absorbency
Extra heavy period days, overnight protection & light bladder leaks - absorbs about 7-9 super tampons’ worth.
Heavy Absorbency
Heavy period days, overnight protection & light bladder leaks - absorbs about 3-6 super tampons’ worth.
Super Leakproof® No-Show Bikini
Save up to 25%
Color: Buttercup, limited edition
Super Leakproof® No-Show Boyshort
Save up to 25%
Color: Lilac, limited edition
Super Leakproof® No-Show French Cut
Save up to 25%
Color: Lilac, limited edition
Super Leakproof® No-Show High Rise
Save up to 25%
Color: Buttercup, limited edition
Super Leakproof® Dream Short
Save up to 25%
Color: Lilac, limited edition
Moderate Absorbency
Moderate period days, light bladder leaks & sweat - absorbs about 2-3 super tampons’ worth.
Leakproof No-Show Thong
Save up to 25%
Color: Lilac, limited edition
Leakproof UltraThin No-Show Bikini
Save up to 25%
Color: White, limited edition
Astrology Collection Leakproof UltraThin Bikini
Save up to 25%
Color: Capricorn, limited edition
Leakproof Cotton Bikini
Save up to 25%
Color: Pepper
Leakproof UltraThin No-Show French Cut
Save up to 25%
Color: Lilac, limited edition
Leakproof UltraThin No-Show High Rise
Save up to 25%
Color: White, limited edition
Leakproof Cotton High Rise
Save up to 25%
Color: Pepper
Leakproof Cotton Boybrief
Save up to 25%
Color: Rose Water
Luxe Modal Leakproof Sleep Boxer
Save up to 25%
Color: Dark Cherry, limited edition
Light Absorbency
Light period days, backup protection & sweat - absorbs about 1-3 regular tampons’ worth.
Light Leakproof No-Show Thong
Save up to 25%
Color: White, limited edition
Light Leakproof No-Show High Rise Thong
Save up to 25%
Color: White, limited edition
Light Leakproof No-Show Bikini
Save up to 25%
Color: Buttercup, limited edition
Light Leakproof No-Show Boyshort
Save up to 25%
Color: Buttercup, limited edition
Light Leakproof Gossamer Lace French Cut
Save up to 25%
Color: Oyster, limited edition
Light Leakproof No-Show French Cut
Save up to 25%
Color: White, limited edition
Light Leakproof No-Show High Rise
Save up to 25%
Color: Lilac, limited edition
Reusable Pads
NEW Reusable Pads! Leak-free protection designed with a comfortable barely-there feel. Super-thin, and easy-to-wash Leakproof pad that you can wear and rewear. Now available in super-absorbent Regular and Overnight styles for confident protection 24/7.
Teen Period Underwear
Moisture-wicking, odor-crushing, life-changing leakproof undies.
Teen Super Leakproof® Sleepover Short
Save up to 25%
Color: Energize, limited edition
Teen Super Leakproof® No-Show Bikini
Save up to 25%
Color: Marina, limited edition
Teen Super Leakproof® No-Show Bikini 3-Pack
Color: Electric Orchid/Teal Appeal/Lagoon, limited edition
Teen Super Leakproof® No-Show Boyshort
Save up to 25%
Color: Mood Ring, limited edition
Teen Super Leakproof® No-Show Boyshort 3-Pack
Color: Energize/Marina/Highlight, limited edition
Teen Leakproof UltraThin No-Show Bikini
Save up to 25%
Color: Electric Orchid, limited edition
Teen Leakproof UltraThin No-Show Bikini 3-Pack
Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition
Teen Leakproof UltraThin No-Show Boyshort
Save up to 25%
Color: Marina, limited edition
Teen Leakproof UltraThin No-Show Boyshort 3-Pack
Color: Picnic Plaid/Cosmo/Ultra Violet, limited edition
Teen Light Leakproof No-Show Bikini
Save up to 25%
Color: Electric Orchid, limited edition
Teen Light Leakproof No-Show Bikini 3-Pack
Color: Energize/Marina/Highlight, limited edition
Teen Light Leakproof No-Show Boyshort
Save up to 25%
Color: Electric Orchid, limited edition
Teen Light Leakproof No-Show Boyshort 3-Pack
Color: Energize/Marina/Highlight, limited edition
Stock Up & Save
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.
Reusable period underwear that truly works - absorbent, leak resistant, comfy and easy to wash. Find your perfect style today!
Your leakproof questions, answered.
