Leakproof Cotton Modal Bikini
41% off
Confident underwear made from super soft cotton modal fabric. Featuring our patented leakproof technology, they absorb about the same as 2 super tampons, and wash easily in the machine.
(product previously named Cotton Super Leakproof™ Bikini)
🇺🇸 Free standard shipping over $100*.
Free expedited shipping over $150*. Duty-free. (after discounts, before shipping + taxes)
For items with a less than 15% discount (before discount codes), you may exchange for another item or return for store credit. No refunds can be accommodated. Items with a greater than 15% discount (before discount codes), are final sale, meaning no returns, exchanges or refunds can be accommodated. No exceptions.
- Liz G.Verified Buyer2 weeks agoRated 5 out of 5 starslove knix leak proof underwear
i bought the cotton ones and they are so confy and fit so well. you will love them
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentFitRated 2.0 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? - Dina W.Verified BuyerI'm a... AdultI purchased for... A Teenager/TweenPant Size Teen 12-16Size Purchased XXLUsage Back-up Protection1 month agoI'm a... AdultI purchased for... A Teenager/TweenPant Size Teen 12-16Size Purchased XXLUsage Back-up ProtectionRated 5 out of 5 starsGo Cotton
Good fit, love the cotton feel.
QualityRated 4.0 on a scale of 1 to 5Poor ExcellentComfortRated 4.0 on a scale of 1 to 5Poor ExcellentSizingRated 0.0 on a scale of minus 2 to 2Fits Small True to Size Fits LargeEffectivenessRated 4.0 on a scale of 1 to 5Poor ExcellentWas this helpful? - Rickie M.Verified Buyer2 months agoRated 5 out of 5 starsI like them
Comfortable and they do the job
ComfortRated 5.0 on a scale of 1 to 5Low HighEffectivenessRated 4.0 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?
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!
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.