Lightest Absorbency

Lightest periods, spotting, sweat & discharge - absorbs about 0.5-1 regular tampon worth.

Light Absorbency

Light periods, backup protection & sweat - absorbs about 1-3 regular tampons’ worth.

Medium Absorbency

Medium periods, light bladder leaks & sweat - absorbs about 2-3 super tampons’ worth.

Leakproof UltraThin No-Show French Cut

$27.00 USD

Save up to 20%

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Leakproof UltraThin No-Show Bikini

$25.00 USD

Save up to 20%

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Leakproof Cotton Bikini

$23.00 USD

Save up to 20%

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Leakproof UltraThin No-Show High Rise

$29.00 USD

Save up to 20%

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Leakproof Cotton High Rise

$27.00 USD

Save up to 20%

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Leakproof Cotton Boybrief

$35.00 USD

Save up to 20%

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Luxe Modal Leakproof Sleep Boxer

$38.00 USD

Save up to 20%

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Heavy Absorbency

Heavy periods, overnight protection & light bladder leaks - absorbs about 3-6 super tampons’ worth.

Ultra Absorbency

Extra heavy periods, overnight protection & light bladder leaks - absorbs about 7-9 super tampons’ worth.

Ultra Leakproof Zones+ High Rise

$39.00 USD

Save up to 20%

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Ultra Leakproof Zones+ Bikini

$36.00 USD

Save up to 20%

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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 Light Leakproof No-Show Bikini

$19.00 USD

Save up to 20%

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Teen Light Leakproof No-Show Boyshort

$19.00 USD

Save up to 20%

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Teen Super Leakproof® No-Show High Rise

$28.00 USD

Save up to 20%

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Teen Leakproof Luxe Modal Sleep Boxer

$29.00 USD

Save up to 20%

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Teen Light Leakproof No-Show Boyshort 3-Pack

$59.00 USD
$66.00

Save 10%

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Teen Light Leakproof No-Show Bikini 3-Pack

$59.00 USD
$66.00

Save 10%

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Teen Leakproof UltraThin No-Show Bikini 3-Pack

$59.00 USD
$66.00

Save 10%

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Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$59.00 USD
$66.00

Save 10%

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Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$59.00 USD
$66.00

Save 10%

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Teen Super Leakproof® No-Show Bikini 3-Pack

$67.00 USD
$75.00

Save 10%

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Teen Super Leakproof® No-Show Boyshort 3-Pack

$67.00 USD
$75.00

Save 10%

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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.