Skip to content

Help
Returns & Exchanges
Shipping
Size Guides
Rewards
Virtual Fittings
Gift Card Balance
FAQs
Contact Us
Virtual FittingsBOOK NOW
Refer a FriendLearn More
About
Knix FundLearn More
Careers at KnixLearn More
Story & Mission
Why Leakproof?
Virtual Fittings
Store Locations
Ambassador Program
Careers
Rewards
Refer a Friend
Gift Cards
Blog

New
Categories
Shop All New
Best Sellers
Thigh Saver® Shorts
Ultra-Thin Leakproof Underwear
Sexy Mesh Collection
Citron Collection
Featured
New Swim is Coming - Get Early Access
Introducing Gabrielle Union
Sport Your Period.
Let's Talk Perimenopause
Gabrielle UnionShop now
NEW CitronSHOP NOW
Leakproof Underwear
Shop by Absorbency
Ultra
Heavy
Medium
Light
Lightest
Zero
All Underwear
Shop by Style
High Rise
Thong
Bikini
Boyshort
French Cut
Shorts & Boxer Briefs
Thigh Savers
Cheeky
Reusable Pads
Save on Period KitsShop Kits
Why Leakproof?SHOP NOW
Bras
Categories
All Bras
T-Shirt Bras
V-Neck Bras
Pullover Bras
Seamless Bras
Sports Bras
Maternity Bras
Find Your Fit
The Bra Guide
Take the Quiz
The Bra GuideLEARN MORE
NEW CitronSHOP NOW
Shapewear
Shop by Style
All Shapewear & Thigh Savers
Thigh Savers
Leakproof Shapewear
Tanks & Bodysuits
Leakproof ShapewearSHOP NOW
NEW Thigh SaversSHOP NOW
Swim
Categories
All Swim
Swim One-Pieces
Swim Tops
Swim Bottoms
Leakproof Swimwear
Sets & Accessories
Cover Ups
Teen Period Swim
Swim CollectionShop Now
Teen Period SwimSHOP NOW
Active & Apparel
Active
All Active
Sports Bras
Leggings & Shorts
Active Tops
Swim
Athleisure
Apparel
All Apparel
Loungewear
Sleepwear
Tanks & Bodysuits
Wardrobe Heroes
Maternity
Swim
Accessories
MaternitySHOP NOW
SleepwearShop Now
Teen
Categories
All Teen
Teen Period Underwear
Teen Thigh Savers
Teen Period Swim
Teen Period Kits
Teen Period Activewear
Teen Thigh SaversSHOP NOW
Teen Period SwimSHOP NOW
Sale

Home/
Underwear

Underwear

687 Items

Contact Us Returns & Exchanges Shipping Product Testing and Safety FAQs Gift Card Balance

Rewards Size Guides Virtual Fittings Resources Store Locations

Story & Mission Sustainability & Philanthropy Careers Blog

Stay in the flow

Give $20Get $20

Privacy Policy
California Privacy Rights
Privacy Choices
Accessibility Statement

Alex has 36.5" hips and wears a Knix size S

Ultra Leakproof Zones+ High Rise

Alex has 36.5" hips and wears a Knix size S

Ultra Leakproof Zones+ High Rise

Maya has 43" hips and wears a Knix size L

Ultra Leakproof Zones+ High Rise

Maya has 43" hips and wears a Knix size L

Ultra Leakproof Zones+ High Rise

Tjalise has 42" hips and wears a Knix size M

Ultra Leakproof Zones+ Bikini

Analysa has 46.5”" hips and wears a Knix size XXL

Ultra Leakproof Zones+ Bikini

Maya has 43" hips and wears a Knix size L

Ultra Leakproof Zones+ Bikini

Alex has 36.5" hips and wears a Knix size S

Ultra Leakproof Zones+ Bikini

Jessie has 46" hips and wears a Knix size XXL

Essential No-Show French Cut

Tsanna has 34.5" hips and wears a Knix size S

Essential No-Show High Rise Thong

+2

Amber has 38" hips and wears a Knix size M

Essential No-Show Thong

+4

Amber has 38" hips and wears a Knix size M

Essential No-Show Boyshort

+7

Sarah has 38" hips and wears a Knix size M

Essential No-Show Boyshort

+7

Maya has 43" hips and wears a Knix size L

Essential Lace Boyshort

Analysa has 46.5”" hips and wears a Knix size XXL

Essential Lace Thong

Alex has 36.5" hips and wears a Knix size S

Essential Lace High Rise

+1

Chinthiya has 42" hips and wears a Knix size L

Essential No-Show Bikini

+9

Maya has 45.5" hips, 34.5" waist and wears a Knix size XL

Essential Cotton Modal Bikini

Chloe has 47" hips and wears a size XL

Essential Cotton Modal High Rise

Marlene has 50" hips and wears a Knix size XXL

Essential No-Show High Rise

Claire has 35" hips, 24" waist and wears a Knix size S

Essential Lace Bikini

+3

Siobhan has 36" hips and wears a size S

Light Leakproof No-Show High Rise Thong

+1

Candice has 50.5" hips and wears a Knix size XXL

Light Leakproof No-Show Thong

+13

Rue has 34" hips and wears a size S

Light Leakproof No-Show Thong

+13

Siobhan has 36" hips and wears a size S

Light Leakproof No-Show French Cut

+16

Maya has 41" hips and wears a Knix size L

Light Leakproof No-Show Cheeky

+6

Siobhan has 36" hips and wears a size S

Light Leakproof No-Show Boyshort

+17

Amber has 38" hips and wears a Knix size M

Light Leakproof No-Show Boyshort

+17

Sarah has 38" hips and wears a Knix size M

Light Leakproof No-Show Boyshort

+17

Sora has 37" hips and wears a size S

Light Leakproof No-Show Boyshort

+17

Chinthiya has 42" hips and wears a Knix size L

Light Leakproof No-Show Boyshort

+17

Chloe has 47" hips and wears a size XL

Light Leakproof No-Show Boyshort

+17

Rue has 34" hips and wears a size S

Light Leakproof No-Show Boyshort

+17

Siobhan has 36" hips and wears a size S

Light Leakproof No-Show High Rise

+15

Chinthiya has 42" hips and wears a Knix size L

Light Leakproof No-Show High Rise

+15

Shaper Bodysuit

Shaper Bodysuit

+1

Shaper Bodysuit

Shaper Bodysuit

+1

Leakproof Thigh Saver® 6”

Leakproof Thigh Saver® 6”

+3

Leakproof Thigh Saver® 6”

Leakproof Thigh Saver® 6”

+3

Leakproof Thigh Saver® 6”

Leakproof Thigh Saver® 6”

+3

Leakproof Thigh Saver® 6”

Leakproof Thigh Saver® 6”

+3

Alicia has 44" hips and wears a Knix size L

Leakproof Thigh Saver® 6”

+3

Rue has 34" hips and wears a size S

Super Leakproof™ No-Show Boyshort

+6

Marlene has 50" hips and wears a Knix size XXL

Super Leakproof™ No-Show Boyshort

+6

Rue has 34" hips and wears a size S

Super Leakproof™ No-Show Boyshort

+6

Amber has 38" hips and wears a Knix size M

Super Leakproof™ No-Show Boyshort

+6

Maya has 41" hips and wears a Knix size L

Light Leakproof No-Show Bikini

+17

Isabelle has 40" hips and wears a Knix size M

Thigh Saver® 6”

+4

High Rise Shaper Shorts

High Rise Shaper Shorts

Chloe has 47" hips and wears a size XL

Super Leakproof™ No-Show Bikini

+8

Chinthiya has 42" hips and wears a Knix size L

Leakproof No-Show Thong

+11

Siobhan has 36" hips and wears a size S

Light Leakproof No-Show Boyshort - Zebra

Maya has 41" hips and wears a Knix size L

Light Leakproof No-Show Bikini - Zebra

Rue has 34" hips and wears a size S

Light Leakproof No-Show Boyshort - Dune

Rue has 34" hips and wears a size S

Light Leakproof No-Show Boyshort - Dune

Sarah has 38" hips and wears a Knix size M

Test of Essential No-Show Boyshort

Siobhan has 36" hips and wears a size S

Essential No-Show Boyshort - Zebra

Sarah has 38" hips and wears a Knix size M

Essential No-Show Boyshort - Black

Sarah has 38" hips and wears a Knix size M

Essential No-Show Boyshort - Black

Siobhan has 36" hips and wears a size S

Light Leakproof No-Show High Rise - Zebra