Thick seams
Pro: It's secure, it's absorbent, it's big.
Con: It's so thick that it's hot and stuffy in the summer and I can't wear light or tight pants with it or else the ugly 11 seams show at my butt.
Classic, cute, and super absorbent, our Bikini style underwear keeps you leak-free and confident.
With a high leg opening, some of our highest leak coverage and a mid-rise fit, our Bikini is made for breathable, waterproof protection. Created with our multi-layer Leak-Loc™ system, this undie draws moisture away from the body, keeping you dry all day.
The Bikini offers total front-to-back leak protection. Our revolutionary leakproof core spans from the front waistband to the back waistband for complete leakproof coverage.
heavy periods
moderate bladder leaks
replace a pad
replace or back up a tampon or cup
sweat
odor reduction
Outer: 75% Nylon 25% Spandex
Lining: 100% Cotton
Lining: 100% Polyester
Lining: 69% Cotton 25% Polyester 6% Acrylate
The bikini undies by Proof feature a mid-rise fit, high cut leg opening, and moderate booty coverage, all in a comfortable stretch fabric that moves with your body.
The bikini features a high-leg opening and narrow sides, with a mid-rise and moderate back coverage. The brief is designed with wider sides, lower rise, and moderate back coverage.
The leakproof bikini by Proof is perfect for heavy periods. It holds up to 4 regular tampons - that’s 8 tsp! - of liquid, making it perfect for all-day or overnight wear. The bikini is also equipped with front-to-back leakproof protection for extended coverage.
Proof undies are designed to be better for you, and the environment! Single-use plastic period products like tampons and pads end up in landfills and oceans, where they pose a serious threat to wildlife. By switching to Proof, you help to reduce single-use plastic waste.
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.
Pro: It's secure, it's absorbent, it's big.
Con: It's so thick that it's hot and stuffy in the summer and I can't wear light or tight pants with it or else the ugly 11 seams show at my butt.
I’m extremely surprised by how well this works! I have very irregular periods, and they can sometimes be very light and other times very heavy. With these undies, I don’t worry about staining or leaking. I wear them for 11-12 hours on my heavy days and they have worked great!
I also love how they wick moisture away from you, so you can feel dry all day. The first time I wore them and tested them around the house, I was able to relax and forget I was even on my period! They are also very easy to wash, though you need to leave them for several hours to air dry. Once you put them on after drying, they conform to your body, so they don’t lose their shape.
I love that it’s like wearing a diaper, except they are far sexier than a diaper! They don’t look different from regular panties and they don’t even leave panty lines under your clothes.
I still use pads for when I’m letting the undies air dry, but I plan to purchase another pair or two so I can rotate them and never have to wear pads again. When you consider how well they’re made, how effective they are and the fact that they’re washable and reusable, you find they’re really not expensive at all. At least I consider the price totally worth it for the peace of mind and comfort it gives me.
I cannot wrap around how completely these undies absorbed my heavy heavy flow. I will absolutely buy some for my daughter when it’s her time.
I like the way this underwear is built. I adheres so well to my body and doesn’t make me feel like I look like I’m on my period.
Definitely happy with this purchase. I will eventually buy more.
I bought several different types of undies from Proof. All we’re size large and fit great except for these. This one fits so differently. Almost like two sizes too small. I can wear it but it’s not super comfy and has zero stretch. Even if I sized up, not sure I’m a fan of this cut/style. Still a fan of Proof though!
I own a cheap bamboo set from Amazon and Thinx:
Thinx super hip hugger
Thinx air hiphugger
Thinx supper cotton brief
I am 47 years old with a 8,6,3 & 1.5 year old. I am old. But I love period panties. I cannot wait to be able to offer more options to my daughters than I was offered when I started my period. I have a pretty heavy period for like 7 days so I am still figuring this out. I have owned my thinx for a year. I won a sweepstakes on Proof. I am very impressed with proof. I would like to try the heavier period panties as these were a heavy not a super heavy. After the birth of my 5th child I have a little bit of uterine prolapse and my menstrual cup is no longer comfortable.
Proof has a more swimwear feeling than the thinx.
By swimwear its a more rubberized fabric but not like neoprene and very silent.
Proof dries more quickly when air dried than thinx
the wrap of the fabric around the crotch zone is nice as it shows the fluid moving towards clothes more easily to let you know its time for a swap.
Thinx does not have a sound but I think a friend touched my panties and threw them in the dryer and they had a noise level to one pair. Noise not more than pants sounds but had a microphone been near my netherlands it might have a slight paper sound on that pair.
I am happy to promote period panties and love this product.
Comfortable, stylish, and worry free. They just work!
For the past 2-3 years I’ve wanted to be done with pads and tampons. Let’s face it, they are ancient and with all the new technology, there is no reason to hold on to them. Yet, every alternative that I researched kept missing the mark. Don’t even get my started on those cups okay. I’ve been wanting to try the leakproof underwear but I wasn’t convinced they would give me what I was looking for. Yet, every cycle I grew more and more in my disdain for products that I would wear panty liners and layer my underwear and clothing just to avoid the bulkiness and discomfort of pads and tampons. Simply put I wanted to feel free. I researched the leakproof underwear again and decided to give it a try. I started with two because the prices were $30-$35 (moderate and heavy flow options) and I didn’t want to waste money on something that didn’t work. Listen!!! This purchase exceeded my expectations. The panties are comfortable, stretchy and secure. The absorption is unbelievable. I feel completely liberated! It’s magical. They feel better than my regular underwear. I will never go back to living in the Stone Age!! I went 6-7 hours in each and there is no wetness, no odor, no residue. NOTHING. Looks and feels like a fresh pair of underwear! I got a size medium and I have a lot of booty but it covered my backside. There was no bunching or wedging. Now that I know they work I recommend buying at least 4 but y’all need to have some discounts. Buy 3 get one free…
Nice and comfortable
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.