Name: Leakproof Brief
Brand: proof.
SKU: PFBF1000SND:XS
Price: 35.0 USD
Availability: InStock

Holds

up to 3 Tampons or 6 Tsps

AbsorbencyHolds up to 3 Regular Tampons or 6 Teaspoons

Color Sand

Black

Sand

QTY

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This Brief will become a staple in your undie drawer!

Our basic brief has a classic fit offering full coverage that flatters all body types. With moderate leak coverage, these undies will draw moisture away from your body with our patented, multi-layer Leak-Loc™ system, while still feeling like your favorite pair. They are slim and highly absorbent to protect you from leaks, day or night.

Extended Lining

The Leakproof Brief offers a slim, flexible Leak Proof™ core along the center of the undie. The extended lining offers enhanced leak protection.

Great for

moderate periods

light bladder leaks

replace a pad

replace or back up a tampon or cup

sweat

odor reduction

Outer: 75% Nylon 25% Spandex

Lining: 100% Polyester

Lining: 69% Cotton 25% Polyester 6% Acrylate

Protection

Extended Lining

The Leakproof Brief offers a slim, flexible Leak Proof™ core along the center of the undie. The extended lining offers enhanced leak protection.

FAQs

See all FAQs

The leakproof brief is perfect for moderate periods, light bladder leaks, sweat, spotting, discharge, and everyday wear. You’ll love it for replacing pads and pantyliners, and to replace or back up tampons and cups. The brief holds up to 3 tampons or 6 tsp.

Yes! The brief is created using antimicrobial fibers that inhibit the growth of bacteria and reduces odor. The moisture wicking lining pulls moisture - including sweat - away from the body and into the leakproof core, helping you to feel dry and comfortable.

The leakproof brief by Proof can be used to replace or back up tampons and cups, or replace pads and pantyliners. Proof undies pull liquid into the absorbent core, so layering a pad over the gusset will not allow Proof to do it’s *super absorbent, moisture wicking* magic.

The Proof leakproof brief was designed for periods. We created Proof undies in a variety of absorbencies, so that you can find the best fit for your flow. The Brief absorbs up to 3 regular tampons’ worth of liquid or 6 tsp. If you have a light to moderate flow, the Brief will handle your flow for an entire day - or night. We recommend wearing a pair of Proof in the right absorbency level for 12 hours, and then changing like you typically would after a shower, after getting up in the morning, or before going to bed in the evening.

Don't just take it from us, hear why real women love Proof...

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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Best leak PROOF undies!

Years ago I discovered ICON underwear and loved them, but they quickly changed their style to the point that they were too tight even with a larger size. Eventually, they change names and though improved, they still aren't the same as the originals. Since then I have tried many other brands which just haven't come close and often they don't offer returns which sucks when you're spending approx $35 a pop. I finally found PROOF and they are the best! Better than the original ICONs. I only wish I caught a sweet sale when I made my recent purchases. They launder well and fit better than the day I first tried them on.

Listen to reviews, size down!

Wish I had gotten these in a size down. I got another style that fit as expected, but these ones run much larger. I find this incredibly frustrating in a brand, I feel like consistent sizing shouldn't be that hard to come by. I would say if you have a larger booty, they might fit but for me they just bunch up and loosen too much throughout the day to be consistently comfortable for a no-butt lady.

Do size down on this style

This brief underwear is SO comfortable! I wanted to get something for my periods that was enviornmentally friendly and I am so happy I stumbled across Proof. I am 5'8", 200lbs and a little heavy-set in my hips and butt. I usually wear an XL in underwear but I sized down to a L and they fit so well! Love the brief!

Proof makes a huge difference for women

Proof is *everything* for women on their period. I love how sleek and smooth these panties are, and they truly are leakproof. It's something you really have to TRY to understand, and once you get a pair, you'll be a Proof fan for life. Plus, I'm a huge fan of the women behind Proof, the brilliant Caden sisterpreneurs!

Leakproof Brief