Leakproof Cotton Modal Bikini
30% off







Leakproof Cotton Modal Bikini
30% off
Knix period underwear and pads are now sales tax-free in Canada.* We celebrate improvements to the accessibility and affordability of essential period care products.
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.
(after discounts, before shipping + taxes) All items ship from within Canada.
EXCHANGE ONLY Items on sale during our Anniversary Sale are exchange only. For items with a 20% or more discount you may exchange for another item or store credit. No refunds.
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.
*Period underwear and pads are exempt from federal sales tax in Canada. They are also exempt from most provincial / harmonized sales taxes. But are subject to the following provincial sales tax rates which will apply to orders shipped to the following provinces and to orders purchased in retail stores located in the following provinces: British Columbia and Manitoba: 7% PST; Saskatchewan: 6% PST.
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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!
- Meg T.Verified Buyer2 days agoRated 5 out of 5 starsTrue comfort
The liner looks thick but I don’t feel it. And I love that the fabric isn’t so slippery that my clothes slide around on top of them - rather, everything stays in place. I like these under jeans or leggings.
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? - Sheryl M.Verified Buyer2 months agoRated 5 out of 5 starsUnderwear
I like the cotton ones the best.
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? - Jen C.Verified Buyer2 months agoRated 5 out of 5 starsFit great
They were on a great sale so I ordered the teen L for myself (adult) and found they fit very similar to an adult M. Great deal!
EffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentComfortRated 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 Use Rated 5.0 on a scale of 1 to 5Poor ExcellentEase of UseRated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful?