Leakproof UltraThin No-Show Bikini
Mix & Match: Buy 3+ Save 10%, Buy 6+ Save 20%
• Our newest leakproof innovation provides more absorbency without the bulk.
• Great for leak protection, the ultra-thin liner absorbs about the same as 2.5 super tampons or 1 regular pad’s worth.
• Our patented 360 LeakSeal™ technology locks in leaks at every edge.
• The carbon cotton gusset top layer wicks away moisture from your skin.
• These underwear feature our signature buttery soft fabric.
• No-show construction is designed to be invisible under clothes, including workout leggings.
• Machine washable just like regular underwear.
Get the protection you want from periods and light bladder leaks while feeling comfortable and worry-free.
🇺🇸 Free standard shipping over $100*.
Free expedited shipping over $150*. Duty-free. (after discounts, before shipping + taxes)
Within 30 days of delivery, you may exchange for another size, style or store credit. We’re unable to provide refunds on underwear.
- Kathy W.Verified Buyer29 minutes agoRated 5 out of 5 starsI love these pants
I’ve worried about this for so many years. And it ended. I love these pants.
Was this helpful? - NancyVerified Buyer2 days agoRated 5 out of 5 starsGreat product, but I wish I had gotten the boyshort style, and the size chart is tricky
Somehow the name boyshort made me think more "shorts" rather than "briefs" (which would have fuller coverage), so I ordered bikinis. In retrospect after looking more closely at the boyshort style, I think they would be perfect. The bikinis definitely ride up and I feel like I am regularly having to adjust them. (I don't necessarily think that's an issue with these specifically, I think it's a problem with all bikini style undies.) Before ordering I consulted the size chart and I measure a M in the measurements, but I always wear 10-12 pants, which they associate with a L, (as opposed to the 6-8 pant size they show for the M.) And I always wear size L undies too. So I ordered several L and one M thinking I'd try one of each and decide before wearing all of the larges. Especially since the descriptions say they will stretch out a bit after use. Although I paid for expedited shipping, they didn't arrive as promised, and I had to leave for a trip, so I just took all the larges hoping for the best. They fit fine other than the riding up issue. When I got home, since the larges were fine, I decided to exchange the unworn medium for another large. They sent the other large, but told me to keep the medium and share with someone. So I decided to go ahead and test it for size since just so I would know for sure. I had the half hope that the medium would fit more snugly and not ride up. But it still does. I honestly can't tell a huge difference between the two sizes in the butt. The…
Was this helpful? - Valley T.Verified Buyer2 days agoRated 5 out of 5 starsComfortable and efficacious.
These are perfect for overnight for me.
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How to wash
Machine Washable: Wash with like colors, cold setting with mild detergent, do not bleach, iron, or dry clean.
Always refer to our Fabric & Care section for best drying practices.
Your leakproof questions, answered.
Our Leakproof technology features a built-in absorbent liner. Depending on the style you choose, the absorbency can range from about 1-17 tsp of liquid. The result? Confident protection from sweat, discharge, periods, and light bladder leaks.
A gusset is essentially a liner. It’s where you’ll find our leakproof technology. It’s built into the crotch section of the underwear.
Coverage at Knix comes in all shapes and sizes. If we’re talking about silhouettes,, we go all the way from thongs to boxers.
We also offer high rise styles, like the Leakproof UltraThin No-Show High Rise, that sits just above the natural waist and gives full coverage through the stomach, hip & bum.
For extra liner coverage, look for undies that have an “extra-long liner” (usually 10”-14”), like in our Dream Short. And our Ultra Zones+ also have full bum coverage, too.
Have a suggested style or coverage? Just let us know. We love the feedback!
Leakproof covers you for all of life’s leaks, like periods (including your heaviest flows), sweat, light bladder leaks, postpartum, and discharge.