Rated 5.0 out of 5
Based on 22 reviews

Leakproof Thong

Regular price $25 Save $-25
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Eliminate panty lines and light leaks
HSA/FSA Approved

Holds
up to 1  Tampon or 2 Tsps
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Rated 5.0 out of 5
Based on 22 reviews

Leakproof Thong

Regular price $25 Save $-25
/
Eliminate panty lines and light leaks
HSA/FSA Approved

AbsorbencyHolds up to 1 Regular Tampon or 2 Teaspoons
Runs Small True to Size Runs Large

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Only 21 items in stock!

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Unseen but powerful, our thong underwear works for your period and leaks…Hooray!

Our breathable, buttery soft microfiber in a low-rise silhouette lets you eliminate panty lines while having a backup for your leaks. Minimal coverage that still includes our multi-layer Leak-Loc™ system.

Regular Lining

The Thong features an invisible leakproof core in the gusset. You’ll be comfortable and protected with our soft and slim multi-layer core.

Great for

light periods

spotting

replace a panty liner

back up a tampon

discharge

sweat

odor reduction

Outer: 75% Nylon 25% Spandex 

Lining: 100% Polyester 

Lining: 69% Cotton 25% Polyester 6% Acrylate

Protection
Regular Lining

The Thong features an invisible leakproof core in the gusset. You’ll be comfortable and protected with our soft and slim multi-layer core.

FAQs

See all FAQs

The Thong is equipped with Leak-Loc™ technology and light absorbency that holds up to 1 regular tampon or 2 tsp. That makes it perfect for light bladder leaks or periods, spotting, discharge, or sweat. The unique moisture-wicking lining and antimicrobial fibers wick moisture away from the body and inhibits the growth of bacteria while fighting odor.

Our leakproof, period-proof thong was designed with comfort in mind. Created with buttery-soft, stretch fabric that moves with the body and a thin, flexible gusset keeps you comfortable, day or night.

We typically advise buying your normal underwear size for the thong. For a more generous, high-rise fit, you may like a size up. For more size guidance, check out our size guide.

Oh yes! The Thong is great for everyday wear, as it provides light ‘back up’ protection for all of those in-between days. Smooth, seamless edges vanish under clothing to provide a sleek look under clothing.

The leakproof thong undie was designed with light periods in mind. If you have a low flow, the thong will pull moisture away from the body and into the Leak-Loc™ core which holds up to 1 regular tampon or 2 tsp.

How Proof Is Made

Proof’s patented Leak-Loc™ technology protects against all of life’s leaks, both big and small. Our undies hold up to 10 teaspoons (that’s 5 full tampons worth!) of liquid. We craft our pairs with rigorously-tested materials, to ensure the highest quality care *down there*.

Explore Our Technology

This is really (really) leakproof underwear

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