Meticulously designed and expertly constructed leakproof undies

Our patented Leak-Loc™ technology

Drop-Stop

Antimicrobial fibers are custom knit to create a super absorbent center layer that pulls in moisture and controls odor

Quik-Wick

Antimicrobial cotton lining pulls moisture away from the body, keeping you dry and comfortable

Seep-Shield Liner

A thin but powerful liner that has exceptional leakproof protection with breathable comfort

Our underwear is certified STANDARD 100 by OEKO-TEX®️ and has been successfully tested for harmful substances.
Thong style undies

Drop-Stop

Antimicrobial fibers are custom knit to create a super absorbent center layer that pulls in moisture and controls odor

Quik-Wick

Antimicrobial cotton lining pulls moisture away from your body, keeping you dry and comfortable

Seep-Shield Liner

A thin but powerful liner that has exceptional leakproof protection with breathable comfort

No-Flo

Ultra-light leakproof technology is fused to buttery soft, waterproof fabric for double the protection against leaks

Leak-Loc™ Edges

Leakproof and reinforced to lock in moisture and prevent leakage

Our underwear is certified STANDARD 100 by OEKO-TEX®️ and has been successfully tested for harmful substances.

Drop-Stop

Antimicrobial fibers are custom knit to create a super absorbent center layer that pulls in moisture and controls odor

Quik-Wick

Antimicrobial cotton lining pulls moisture away from your body, keeping you dry and comfortable

Seep-Shield Liner

A thin but powerful liner that has exceptional leakproof protection with breathable comfort

No-Flo

Ultra-light leakproof technology is fused to buttery soft, waterproof fabric for double the protection against leaks

Leak-Loc™ Edges

Leakproof and reinforced to lock in moisture and prevent leakage

Our underwear is certified STANDARD 100 by OEKO-TEX®️ and has been successfully tested for harmful substances.

Drop-Stop

Antimicrobial fibers are custom knit to create TWO super absorbent center layers that pull in moisture and control odor

Quik-Wick

Antimicrobial cotton lining pulls moisture away from your body, keeping you dry and comfortable

Seep-Shield Liner

A thin but powerful liner that has exceptional leakproof protection with breathable comfort

No-Flo

Ultra-light leakproof technology is fused to buttery soft, waterproof fabric for double the protection against leaks

Leak-Loc™ Edges

Leakproof and reinforced to lock in moisture and prevent leakage

Extended protection

Extra long leakproof coverage from front to back keeps leaks locked in everywhere

Our underwear is certified STANDARD 100 by OEKO-TEX®️ and has been successfully tested for harmful substances.

Drop-Stop

Antimicrobial fibers are custom knit to create THREE super absorbent center layers that pull in moisture and control odor

Quik-Wick

Antimicrobial cotton lining pulls moisture away from your body, keeping you dry and comfortable

Seep-Shield Liner

A thin but powerful liner that has exceptional leakproof protection with breathable comfort

No-Flo

Ultra-light leakproof technology is fused to buttery soft, waterproof fabric for double the protection against leaks

Leak-Loc™ Edges

Leakproof and reinforced to lock in moisture and prevent leakage

Extended protection

Extra long leakproof coverage from front to back keeps leaks locked in everywhere.

Our underwear is certified STANDARD 100 by OEKO-TEX®️ and has been successfully tested for harmful substances.
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

Proof handles any type of leaks
How can we help?

Don't just take it from us

“So great!! If you’re thinking about getting these just do it! So comfortable and protective. Will be ordering more for sure.”

Amy

“Now my period underwear are my favorite underwear”

Sierra

“I’ve used other period underwear before and I was shocked at how much better these were — I used to bring 2+ pairs of the other brand just in case. I was more than fine with one pair of Proof underwear!”

Adrianne

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

You've got questions

Proof undies are designed for comfort and all-day wear.

Our Super-Light, Light and Moderate undies feel just like your favorite pair of regular underwear. Our Heavy and Super-Heavy styles may feel slightly more substantial due to their highly absorbent construction, but they will still feel super comfortable.

Most importantly, you’ll love the extra protection.

In a word, yes!

Our super heavy styles hold 5 tampons or 10 teaspoons of liquid and can replace panty liners and pads as well as replacing or backing up tampons and cups.

If you're unsure about switching to Proof completely, you may feel more comfortable using Proof undies as a back-up for your menstrual cup or tampon.

Panty liners are a thing of the past with Proof. Welcome to modern leak protection - no liners needed!