So comfortable!
This is the perfect solution for the last few days of my period!
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.
The Thong features an invisible leakproof core in the gusset. You’ll be comfortable and protected with our soft and slim multi-layer core.
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
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.
Sleep tight, all night long in the Proof period thong. Really, there are no rules regarding what you can and can’t do in this thong. With this breathable and buttery thong featuring leakproof protection you are ready for anything, day or night. Keep in mind though, the Proof period thong has light absorbency which means it holds up to 1 regular tampon or 2 teaspoons of liquid. If you think you’ll need more protection than this, Proof has plenty of other leakproof undies and thongs that offer more absorbency. The Proof period thong is best for sweat, discharge, spotting, light period leaks, and panty liner replacement.
The leakproof thong is available in black or sand. These color thongs are a staple to every women’s wardrobe - order both. You won’t regret it.
Yes and yes! Proof really has you covered - if you let them of course. Our leakproof undies are designed with several layers of moisture-wicking, absorbent materials that pull moisture away from the body and into a super absorbent core. They are designed to wick away sweat and moisture whether you're enduring an intense workout and taking an afternoon stroll. All the while, our antimicrobial fibers will be fighting odors too. See what we mean when we say we have you covered?
Proof’s leakproof thong can be worn every day, period or not. Our leakproof thongs can certainly prevent leaks during your period, but it’s designed to do much more. The leakproof thong is great for absorbing sweat, discharge, sweat, or spotting, as well as light period leaks.
All of Proof’s leakproof thongs and undies can be worn while working out. In fact, we recommend doing so. Whether you’re on your period or not, the leakproof thong can offer several benefits while working out. It can help absorb sweat while fighting odor, keeping you cool, dry, and focused on your workout.
No need. In fact, you can make a big environmental impact by not wearing pads or tampons. Proof leakproof undies are designed to be a reusable alternative to single-use plastics. By eliminating the use of pads and tampons, you can impact the overall well-being of our planet. Tampons, pads, and panty liners are a huge source of waste. On average a single woman disposes of about 11,000 tampons in her lifetime. Each year an estimated 20 billon pads and tampons are thrown into North American landfills. With a lack of oxygen, it’s unlikely that these products will decompose. It could take 800 years for non-recyclable female care products to actually decompose. By wearing Proof leakproof undies you can make a big impact.
Imagine breathable, buttery soft fabric that makes you feel free. We’ve all (hopefully) had that ahh moment slipping on a dreamy pair of underwear. Now imagine if you could have that same feeling while knowing you can stay dry and confident all day or all night long. It’s empowering. Slip on the leakproof thong and worry about what’s important in life, not your underwear. Besides, it’s so comfortable you’ll probably forget you are even wearing any. The real proof though, is in our reviews
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.
This is the perfect solution for the last few days of my period!
What a lifesaver this leakproof nude thong is - I packed 3 days of outfits in light/white bottoms for Coachella and then my heart sank when I realized my period was going to come any day that weekend. Even with tampons I leak on my first days, so ordering 3 of these nude thongs SAVED me! I was able to still wear all 3 outfits without the worry of staining my clothes, and they stayed dry when (sure enough) I did start to leak on day 2 . Could not recommend this thong enough-especially as a summer staple when basically every outfit calls for no-show nude underwear!
I wear these everyday! I don't leave my house without them. I'm a 56 year young women who has terrible bladder leakage. I walk I leak, I laugh I leak, I stand up I leak! It is so frustrating. These leakproof thongs are the real deal! I figured being a thong there is no way. OH YES THERE IS!! Trust me! Proof is the proof that I needed. Just try one pair, I was hooked.
Absolutely love this leakproof / ultra comfy thong (that I honestly wear when I’m not on my period too)!
I love not having to worry about an emergency during my period with this leak proof thong. Our cycles aren’t something that should hold us back from doing what we love!
Love this thong! I was skeptical about how well it would hold up when I dance and do active things, but it's legit!
I have one pair of proof panties and I was honestly skeptical on how a thong would hold up during a period but it honestly was so nice!! I loved not having to wear a pad or tampon and felt very freeing!
No more liners and waste for me! As someone with a chaotic and irregular cycle my whole life, it was always a guessing game when shark week would start and liners were sadly a daily must as a safety measure. These have lasted me several months so far, with no sign of wear on them yet. I love them and am buying another weeks supply to make them a permanent edition.
I love not having to worry about a emergency during my period with this leak proof thong. Our cycles aren’t something that should hold us back from doing what we love!
With a pair for every flow, you’ll be able to find your Proof™-perfect fit.
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Proof™ provides serious protection from bladder leaks, without added bulk.
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Discrete protection with room to accommodate your growing bump.
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Designed with new moms in mind, leak protection without the bulk.
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Go ahead, break a sweat. Our moisture-wicking fabric also reduces odor.
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Undercover protection for every day of the week.
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Perfect for daily discharge, Proof™ keeps you fresh and dry.
Our Patented Leak-Loc™ technology keeps you leak-free learn more
For in-between days, these undies keep you spotless all day long.
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Holds up to 1 Light Tampon or Panty Liner
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Holds up to 1 Regular Tampon or 2 Teaspoons
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Holds up to 3 Regular Tampons or 6 Teaspoons
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Holds up to 4 Regular Tampons or 8 Teaspoons
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Holds up to 5 Regular Tampons or 10 Teaspoons
Our Patented Leak-Loc™ technology keeps you leak-free learn more
Your hip and waist measurements are the most important size when finding the perfect fit.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.
Measure around your body as shown.
If your measurements fall into different size categories, your hip measurement will be most accurate.