Leakproof UltraThin No-Show French Cut
Mix & Match: Buy 4+ Save 15%, 7+ Save 25%








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.
• Our newest leakproof innovation provides more absorbency without the bulk.
• Great for peace of mind 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.
• Classic mid-rise silhouette
• More butt coverage than Cheeky, less than Bikini styles
• Higher cut leg opening
• Ultra-thin, built-in liner
• Absorbs about 2.5 super tampons’ worth of liquid
• Quick dry gusset
• Soft, stretchy fabric
• Conforms to your body
• Bonded seams for a smooth look, no dig in
The fabric is designed to feel snug at first but relax with wash and wear for a perfect fit.🇨🇦 Free standard shipping over $100.
Free expedited shipping over $150.
(after discounts, before shipping + taxes) All items ship from within Canada.
Within 30 days of delivery, you may exchange for another size, style or store credit. We’re unable to provide refunds on underwear.
- Vivian E C.Verified Buyer3 days agoRated 5 out of 5 starsBest undies ever!
Have been wearing Knix for years! Still wearing 1st 6; just got 6 French cut. Love them even more!
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? - Cindy D.Verified Buyer5 days agoRated 5 out of 5 starsFrench cut ultra thin leakproof
My favourite style! Always fits well and the colours are beautiful!
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? - Holly B.Verified Buyer2 weeks agoRated 5 out of 5 starsPanties
Love, love these period panties. I no longer have periods but it sure works on urinary problems. We all have leaks but girl…. I’m a heavy leaker and it works fantastic ! Thank you Knixs
ComfortRated 4.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentSizingRated 1.0 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.
*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!