Leakproof Cotton Bikini
Mix & Match: Buy 3+ Save 10%, 6+ Save 20%
Leakproof Cotton Bikini
Mix & Match: Buy 3+ Save 10%, 6+ Save 20%
• Great for daytime protection, the ultra-thin liner absorbs about the same as 3 super tampons or 1.5 regular pads worth of liquid.
• The innovative floating gusset provides leak protection from every angle.
• The cotton-spandex blend feels luxurious against your skin.
• Certified according to OEKO-TEX® STANDARD 100, Product Class I : HK020 246396 TESTEX
• Machine washable just like regular underwear.
Get the protection you want from periods and light bladder leaks while feeling comfortable and worry-free.
• Classic mid-rise silhouette
• Medium hip & bum coverage
• Absorbs the same as about 3 super tampons’ worth of liquid
• Quick dry liner
• Soft, cotton-spandex blend
Body: 96% Cotton/Coton, 4% Spandex; Fresh Fix Technology® Gusset: Gusset 1: 92% Polyester, 8% Spandex; Gusset 2: 95% Polyester, 5% Spandex; Gusset 3: 100% Polyester; 100% Thermoplastic Polyurethane
Additional Product Ingredient Information
🇺🇸 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.
Our Absorbency Guide
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!
Many people refer to them as period underwear or period panties. But leakproof underwear covers you for all of life’s leaks, including periods (even your heaviest flows), sweat, light bladder leaks, postpartum, and discharge.
- Jen2 days agoRated 5 out of 5 starsLove love love them!
The cotton bikini style with moderate absorbancy are absolutely amazing! They are so comfortable I don't realize I am wearing anything at all. The leak protection is great. They aren't bulky like pads. I am so in love with these underwear. I finally feel like a normal person again and don't worry about my pad shifting and not catching my bladder leaks. I will be ordering more of the cotton and already ordered the ultra thin to try them out.
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentSizingRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeWas this helpful? - Dawn B.Verified Buyer4 days agoRated 5 out of 5 starsComfortable undies
This are great underwear, not bulky, absorbs well, don’t rid up after wearing them all day! Very comfortable!
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentSizingRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeWas this helpful? - Alicia H.Verified Buyer5 days agoRated 5 out of 5 starsEveryone should have these.
Absolutely life changing! Thanks for the great quality and fast service.
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeEase of UseRated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful?