“These Are the Only Period Swimsuits You Can Trust While in the Water”-Shape

No more poolside panic. Swim worry-free with new Period Swim.

“These Are the Only Period Swimsuits You Can Trust While in the Water”-Shape

No more poolside panic. Swim worry-free with new Period Swim.

Bleed Confidence

New Arrivals

Sunny Skies Rash Guard

$55 ^USD New Style

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MAXIMUM BUM COVERAGE

+5
+1

Period Swim Short

Moderate Absorbency

$50 ^USD New Colors

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Racerback Tankini Swim Top

$45 ^USD New Style

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Period Swim Square Neck One-Piece

Moderate Absorbency

$83 ^USD New Colors

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+1

Period Swim Full-Coverage Bikini Bottom

Moderate Absorbency

$40 ^USD New Colors

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Square Neck Scoop Bikini Top

$45 ^USD New Colors

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Absorbs 1-3 tsp

First Serve Pleated Skort

Light Absorbency

$55 ^USD New

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Absorbs 3-6 tsp

Leakproof Active Legging

Moderate Absorbency

$65 ^USD

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FREE SHIPPING OVER $70

10k+ 5-star reviews & counting

The numbers don't lie. This is the internet's favorite period protection.

10k+ 5-star reviews & counting

The numbers don't lie. This is the internet's favorite period protection.

COMFORTABLE

ABSORBENT

REUSABLE

COMFORTABLE

ABSORBENT

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Bundle & Save up to 25%

+4

Super Leakproof® Sleepover Short

Heavy Absorbency

$39 ^USD Buy 4+ Save 15%, Buy 7+ Save 25%

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+4

Leakproof UltraThin No-Show Underwear Bikini

Moderate Absorbency

$22 ^USD Buy 4+ Save 15%, Buy 7+ Save 25%

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Leakproof Cotton Underwear Bikini

Moderate Absorbency

$20 ^USD Buy 4+ Save 15%, Buy 7+ Save 25%

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+10
+6

Super Leakproof® No-Show Underwear Bikini

Heavy Absorbency

$25 ^USD Buy 4+ Save 15%, Buy 7+ Save 25%

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+3

Leakproof UltraThin No-Show Underwear Boyshort

Moderate Absorbency

$22 ^USD Buy 4+ Save 15%, Buy 7+ Save 25%

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+3

Light Leakproof No-Show Underwear Bikini

Light Absorbency

$19 ^USD Buy 4+ Save 15%, Buy 7+ Save 25%

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+10
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Super Leakproof® No-Show Underwear Bikini

Heavy Absorbency

$25 ^USD Buy 4+ Save 15%, Buy 7+ Save 25%

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+7
+3

Light Leakproof No-Show Underwear Boyshort

Light Absorbency

From $11.40 ^USD $19 Buy 4+ Save 15%, Buy 7+ Save 25%

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For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

for this generation

For the planet

for real life

Game, set, confidence

New Period Activewear helps you bring your A-game every day of the month.

Game, set, confidence

New Period Activewear helps you bring your
A-game every day of the month.

Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence Bleed Confidence

Light Flows

🩸

Absorbs light flows, sweat, and discharge.

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Moderate Flows

🩸🩸🩸

For medium period days and sweat.

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Heavy Flows

🩸🩸🩸🩸

Designed for heavy period days & overnight protection.

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Free Period Guide

Everything your teen ever wanted to know about puberty, menstruation, and more.

Download the Guide

@bellalogiudice

@namika_courtois

@caitlynmaile

@selenagallowayy

“With this new line, teens can lean into that life well lived from their very first period”

"KT by Knix is aimed at both helping teen girls deal with the reality of periods"

“KT by Knix products are simple and easy to use — you can wear them under absolutely anything”

KT Size	Hips	Kids Pant Size	Adult Pant Size
XXS	25” - 27”	7	---
XS	28” - 30”	8 - 10	---
S	31” - 34”	12 - 14	00 - 2
M	35” - 38”	16 - 20	4 - 8
L	39” - 42”	---	10 - 14
XL	43” - 46”	---	16 - 18
XXL	47” - 50”	---	20 - 22

KT Size	Band	Hips	Kids Pant Size	Adult Pant Size
XXS	23 ³/₄" - 25 ¹/₄"	25” - 27”	7	---
XS	25 ¹/₄" - 26 ³/₄"	28” - 30”	8 - 10	---
S	26 ³/₄" - 28 ¹/₄"	31" - 34"	12 - 14	00 - 2
M	28 ¹/₄" - 29 ³/₄"	35” - 38"	16 - 20	4 - 8
L	29 ³/₄" - 31 ¹/₂"	39” - 42”	---	10 - 14
XL	31 ¹/₂" - 33 ¹/₂"	43” - 46”	---	16 - 18
XXL	33 ¹/₂" - 35 ¹/₂"	47” - 50”	---	20 - 22

KT Size	Hips	Kids Pant Size	Adult Pant Size
XXS	25” - 27”	7	---
XS	28” - 30”	8 - 10	---
S	31” - 34”	12 - 14	00 - 2
M	35” - 38”	16 - 20	4 - 8
L	39” - 42”	---	10 - 14
XL	43” - 46”	---	16 - 18
XXL	47” - 50”	---	20 - 22

KT Size	Band	Hips
XS	28"	25” - 27”
S	30"	28” - 30”
M	32"	31” - 35”
L	34"	36” - 40”
XL	36"	41” - 44”
XXL	38"	45” - 48”

Size	Bust	Hips
XS	27”	25" - 27"
S	30”	28" - 30"
M	34"	31" - 35"
L	37”	36" - 40"
XL	40”	41" - 44"
XXL	40”	45" - 48"

Size	Hips	Height	Weight
XS/S	25" - 30"	4'2" - 5'1"	65 - 100 lbs
M/L	31" - 40"	4'9" - 5'6"	105 - 130 lbs
XL/XXL	41" - 48"	4'11" - 5'6"	135 - 170 lbs