Lightest Absorbency

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

Light Leakproof No-Show Thong - Flash Sale

$12.00 USD
$20.00

40% off

+2
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Light Leakproof No-Show Thong

$14.00 USD
$20.00

30% off

+4
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Light Leakproof No-Show High Rise Thong

$16.80 USD
$24.00

30% off

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Light Leakproof No-Show Bikini

$15.40 USD
$22.00

30% off

+7
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Light Leakproof No-Show Boyshort - Flash Sale

$13.00 USD
$22.00

40% off

+7
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Light Leakproof No-Show High Rise - Flash Sale

$15.00 USD
$26.00

40% off

+5
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Light Leakproof No-Show High Rise

$18.20 USD
$26.00

30% off

+6
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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 - Flash Sale

$16.00 USD
$27.00

40% off

+3
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Leakproof UltraThin No-Show French Cut

$18.90 USD
$27.00

30% off

+5
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Leakproof UltraThin No-Show Bikini - Flash Sale

$15.00 USD
$25.00

40% off

+3
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Leakproof UltraThin No-Show Bikini

$17.50 USD
$25.00

30% off

+4
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Leakproof Cotton Bikini

$16.09 USD
$23.00

30% off

+1
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Leakproof UltraThin No-Show High Rise - Flash Sale

$17.00 USD
$29.00

40% off

+3
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Leakproof UltraThin No-Show High Rise

$20.30 USD
$29.00

30% off

+3
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Leakproof Cotton High Rise

$18.90 USD
$27.00

30% off

+1
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Leakproof Cotton Boybrief

$24.50 USD
$35.00

30% off

+1
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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+ Bikini

$25.20 USD
$36.00

30% off

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Ultra Leakproof Zones+ High Rise

$27.30 USD
$39.00

30% off

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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.

Up to 60% off Teen Period Underwear

Moisture-wicking, odor-crushing, life-changing leakproof undies.

Teen Light Leakproof No-Show Bikini 2-Pack - Flash Sale

$19.00 USD
$38.00

50% off

+1
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Teen Super Leakproof® No-Show Bikini 2-Pack - Flash Sale

$25.00 USD
$50.00

50% off

+1
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Teen Super Leakproof® No-Show Boyshort 2-Pack - Flash Sale

$25.00 USD
$50.00

50% off

+1
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Teen Light Leakproof No-Show Bikini

$7.60 USD
$19.00

60% off

+17
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Teen Light Leakproof No-Show Boyshort

$13.30 USD
$19.00

30% off

+11
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Teen Light Leakproof No-Show High Rise

$15.40 USD
$22.00

30% off

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Teen Leakproof UltraThin No-Show Bikini 3-Pack

$46.19 USD
$66.00

30% off

+3

Teen Leakproof UltraThin No-Show Boyshort 3-Pack

$46.19 USD
$66.00

30% off

+3

Teen Leakproof Cotton Bikini

$14.00 USD
$20.00

30% off

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Teen Super Leakproof® No-Show High Rise

$11.20 USD
$28.00

60% off

+1
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Teen Light Leakproof No-Show Boyshort 3-Pack

$39.90 USD
$57.00

30% off

+3

Teen Light Leakproof No-Show Bikini 3-Pack

$39.90 USD
$57.00

30% off

+4

Teen Super Leakproof® No-Show Boyshort 3-Pack

$52.50 USD
$75.00

30% off

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Teen Light Leakproof No-Show Boyshort

$7.60 USD
$19.00

60% off

+11
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Teen Super Leakproof® No-Show Bikini

$10.00 USD
$25.00

60% off

+17
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Teen Super Leakproof® No-Show Boyshort

$10.00 USD
$25.00

60% off

+7
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Teen Super Leakproof® No-Show Bikini 3-Pack

$52.50 USD
$75.00

30% off

+1
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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.