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Everyone’s switching to Period Underwear

Everyone’s switching to Period Underwear

Everyone’s switching to Period Underwear

See why Good Housekeeping awarded Knix the best overall period underwear!

The best thing to happen to periods ever

Imagine the confidence you’ll feel in underwear that absorbs the same as about 8 regular tampons. And they feel and wash just like regular undies.

★★★★★

“They fit perfectly AND handle my heavy days beautifully.”
Sonya S.

FIND THE BEST PAIR FOR YOU

FIND THE BEST PAIR FOR YOU

Covered for everything

✓ For light days or backup protection

✓ Full replacement of disposables on heavy days

✓ Protection day or night

✓ Save up to 20% when you buy 7+ pairs

Shop by underwear style

High Rise

High Rise

Bikini

Bikini

Boyshort

Boyshort

Shorts + Boxer Briefs

Shorts + Boxer Briefs

Thong

Thong

Cheeky

Cheeky

“I bought 11 pairs and I’m never turning back.”

“I bought 11 pairs and I’m never turning back.”

“I bought 11 pairs and I’m never turning back.”

Sandra P.

“I haven’t felt this secure, comfortable and protected ever.”

“I haven’t felt this secure, comfortable and protected ever.”

“I haven’t felt this secure, comfortable and protected ever.”

Sheny T.

“I can’t believe I’ve gone so long without these!”

“I can’t believe I’ve gone so long without these!”

“I can’t believe I’ve gone so long without these!”

Liz

“I bought 11 pairs and I’m never turning back.”

“I bought 11 pairs and I’m never turning back.”

“I bought 11 pairs and I’m never turning back.”

Sandra P.

“I haven’t felt this secure, comfortable and protected ever.”

“I haven’t felt this secure, comfortable and protected ever.”

“I haven’t felt this secure, comfortable and protected ever.”

Sheny T.

Ways to save

Save on Period Kits

Save on Period Kits

Skip the guesswork with curated Period Underwear Kits and save 10–15%

Save up to 20%

Save up to 20%

Stock up and save when you buy more pairs.

Earn points with Knix Rewards

Earn points with Knix Rewards

Spend $1, earn 1 point every time you shop. Redeem $10 every 100 points.

Knix Founder, Joanna Griffiths explains Period Underwear

More ways to feel unapologetically free

More ways to feel unapologetically free

More ways to feel unapologetically free

Find an amazing wireless bra to match your Undies. Plus explore our other products, all designed to make you feel so comfortable in your own skin.

BRAS EVERYDAY UNDERWEAR SLEEPWEAR ACTIVEWEAR APPAREL Maternity

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Value Prop United States

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