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The one bra every teen needs

Introducing the On-the-Daily Bra. The bra that has you feeling comfy and supported from homeroom to practice to homework.

The one bra every teen needs

Introducing the On-the-Daily Bra. The bra that has you feeling comfy and supported from homeroom to practice to homework.

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FREE SHIPPING OVER $70

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FREE SHIPPING OVER $70

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FREE SHIPPING OVER $70

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Buy 3+ & Save

+3

Super Leakproof® No-Show Underwear Bikini

Heavy Absorbency

$27 ^USD 3+ for $25 EACH

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+3

Light Leakproof No-Show Underwear Boyshort

Light Absorbency

$22 ^USD 3+ for $20 EACH

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Leakproof UltraThin No-Show Thong

Light Absorbency

$24 ^USD 3+ for $21.67 EACH

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+3

Super Leakproof® No-Show Underwear Boyshort

Heavy Absorbency

$27 ^USD 3+ for $25 EACH

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Leakproof UltraThin No-Show Underwear Bikini

Moderate Absorbency

From $24 ^USD 3+ for $21.67 EACH

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+3

Super Leakproof® No-Show Underwear Bikini

Heavy Absorbency

From $27 ^USD 3+ for $25 EACH

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Leakproof UltraThin No-Show Underwear Boyshort

Moderate Absorbency

From $24 ^USD 3+ for $21.67 EACH

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10k+ 5-star reviews

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Buy 3+ and Save

The internet’s favorite period protection for teens. Save when you stock up on three or more undies in the same absorbency.

Buy 3+ and Save

The internet’s favorite period protection for teens. Save when you stock up on three or more undies in the same absorbency.

Machine Washable

Machine Washable

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Best Sellers

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Super Leakproof® Sleepover Short

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Period Swim Sport One-Piece

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First Serve Pleated Skort

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Period Swim Short

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Light Leakproof No-Show Underwear Boyshort 3-Pack

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Leakproof Cotton Underwear Bikini

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Leakproof UltraThin No-Show Underwear Bikini 3-Pack

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First Pair Risk-Free

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New Season. New Colors.

A fresh drop made for practice, play, and everything in between.The swim you live in now in new colors.

New Season. New Colors.

A fresh drop made for practice, play, and everything in between.The swim you live in now in new colors.

New Arrivals

Seamless pullover style

On-The-Daily Bra

$35 ^USD New

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+3

Period Swim Sport One-Piece

Moderate Absorbency

$88 ^USD New Colors

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Leakproof UltraThin No-Show Underwear Bikini 3-Pack

Moderate Absorbency

From $59 ^USD $72 Save up to 15% off

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Period Swim Full-Coverage Bikini Bottom

Moderate Absorbency

From $45 ^USD New Colors

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Leakproof Luxe Modal Sleep Boxer

Moderate Absorbency

From $34 ^USD

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Leakproof Luxe Modal Sleep Boxer

Moderate Absorbency

From $34 ^USD

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Leakproof Luxe Modal Sleep Boxer

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Leakproof Luxe Modal Sleep Boxer

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1
keeps your teen dry

Moisture-wicking, antibacterial, odor-crushing fabric
2
absorbs blood

Has the power of absorbing up to 20 tampons or pads
3
seals in leaks

Liquid-resistant fabric means zero accidents waiting to happen

Shop Teen Period Underwear

Free Period Guide

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

Download the Guide

“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”

Teen Underwear Size Chart

KT Period Underwear is designed for smaller and growing bodies to fit teens and tweens

For adult sizes and styles, check out Knix .

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

Find the Perfect Fit

1. Hips

Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Teen Swimwear Size Chart

KT swimsuits are designed for smaller and growing bodies to fit teens and tweens

For adult sizes and styles, check out Knix .

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

Find the Perfect Fit

1. Band

First, measure around the torso right below the breast

2. Hips

Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Teen Activewear Size Chart

KT activewear is designed for smaller and growing bodies to fit teens and tweens

For adult sizes and styles, check out Knix .

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

Find the Perfect Fit

1. Hips

Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Teen Leotard Size Chart

KT leotards are designed for smaller and growing bodies to fit teens and tweens

For adult sizes and styles, check out Knix.

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”

Find the Perfect Fit

1. Band

First, measure around the torso right below the breast

2. Hips

KT Leotards are designed to sit on the hips, so measure around the widest part of the hips and refer to the chart above to find the best fit.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Teen Sweatshirt Size Chart

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"

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Freestyle Leakproof Tights Size Chart

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

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Thigh Savers Size Chart

KT Products are designed for smaller and growing bodies to fit teens and tweens

For adult sizes and styles, check out Knix .

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

Find the Perfect Fit

1. Hips

Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.