The only period undies rated 5 out of 5 stars

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This is really (really) leakproof underwear

the only patented undies for leaks

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LEAK-LOC™ TECHNOLOGY Icon
LEAK-LOC™ TECHNOLOGY
Our patented technology has multiple layers that lock in your leaks
BREATHABLE + COMFY Icon
BREATHABLE + COMFY
Super soft, breathable fabric keeps you comfortable and secure
REALLY (REALLY) DRY Icon
REALLY (REALLY) DRY
Our unique interlock lining wicks away moisture for all-day dryness
DECREASES ODOR Icon
DECREASES ODOR
Antimicrobial fibers reduce odor and help you feel cool and confident

We’ve got a perfect pair for every booty

FIND THE BEST PAIR FOR YOUR LEAKS
Period Leaks Image Shop Now
A saving grace for white pants
All our undies are great for periods!
From light to super-heavy period leaks See All
Bladder Leaks Image Shop Now
If your sneezes create sprinkles… you need these.
All our undies work for leaks!
From light sprinkles to heavy tinkles See All
maternity Icon
The Everyday Undie Image Shop Now
The Everyday Undie
Pregnancy leaks can be a real mother
Holds up to 1/2 Regular Tampon

or 1/2 Teaspoon

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The Brief Image Shop Now
The Brief
Pregnancy leaks can be a real mother
Holds up to 3 Regular Tampons

or 6 Teaspoons

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The Lace Cheeky Image Shop Now
The Lace Cheeky
Pregnancy leaks can be a real mother
Holds up to 3 Regular Tampons

or 6 Teaspoons

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The Thong Image Shop Now
The Thong
Pregnancy leaks can be a real mother
Holds up to 1 Regular Tampon

or 2 Teaspoons

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postpartum Icon
The Bikini Image Shop Now
The Bikini
For the leaks no one warned you about (except us)
Holds up to 4 Regular Tampons

or 8 Teaspoons

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The Mesh Hipster Image Shop Now
The Mesh Hipster
For the leaks no one warned you about (except us)
Holds up to 4 Regular Tampons

or 8 Teaspoons

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The Hipster Image Shop Now
The Hipster
For the leaks no one warned you about (except us)
Holds up to 5 Regular Tampons

or 10 Teaspoons

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sweat Icon
The Everyday Undie Image Shop Now
The Everyday Undie
Undies that wick it good
Holds up to 1/2 Regular Tampon

or 1/2 Teaspoon

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The Thong Image Shop Now
The Thong
Undies that wick it good
Holds up to 1 Regular Tampon

or 2 Teaspoons

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everyday Icon
The Everyday Undie Image Shop Now
The Everyday Undie
An undie upgrade for every day of the week
Holds up to 1/2 Regular Tampon

or 1/2 Teaspoon

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The Brief Image Shop Now
The Brief
An undie upgrade for every day of the week
Holds up to 3 Regular Tampons

or 6 Teaspoons

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The Thong Image Shop Now
The Thong
An undie upgrade for every day of the week
Holds up to 1 Regular Tampon

or 2 Teaspoons

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discharge Icon
The Thong Image Shop Now
The Thong
A catchall for in-between days and after sex
Holds up to 1 Regular Tampon

or 2 Teaspoons

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The Brief Image Shop Now
The Brief
A catchall for in-between days and after sex
Holds up to 3 Regular Tampons

or 6 Teaspoons

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The Lace Cheeky Image Shop Now
The Lace Cheeky
A catchall for in-between days and after sex
Holds up to 3 Regular Tampons

or 6 Teaspoons

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spotting Icon
The Everyday Undie Image Shop Now
The Everyday Undie
See spots disappear
Holds up to 1/2 Regular Tampon

or 1/2 Teaspoon

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The Thong Image Shop Now
The Thong
See spots disappear
Holds up to 1 Regular Tampon

or 2 Teaspoons

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See Our Proof
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Proof Gives Back
Meet Our Partners
Don't just take it from us Icon

Don't just take it from us

Read Real Reviews
“There are so many worries I have on my period and Proof underwear solved them for me.”
Dominique
Moderate Periods
Bought The Brief
“If anyone out there has a heavy flow, I highly suggest this brand. They are worth every penny!”
Karen
Heavy Period
Bought The Bikini
“I wear mine after sex to clean up... messes. (You know!) I don’t think I’ll ever go back to normal undies.”
Claire
Discharge
Bought The Everyday Undie
“Now my period underwear are my favorite underwear!”
Sierra
Spotting
Bought The Thong
“Nothing ever works for me and I was shocked. No leaks, not even a hint of moisture!”
B
Postpartum
Bought The Hipster

From light sprinkles to
heavy flows, we're here for you

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