Leakproof UltraThin No-Show French Cut
Mix & Match: Buy 3+ Save 10%, 6+ Save 20%
• 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.
🇺🇸 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.
- Karla J.Verified BuyerYesterdayRated 5 out of 5 starsLove love love
How have I lived post menopause without these?? Every sneeze, cough and laugh has protection! No more embarrassing leaks!! This is my second batch...I now have 10 days worth and would never leave home without them!!!
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? - Gayle H.Verified BuyerYesterdayRated 5 out of 5 starsHow I like my Knix
I don’t like them I absolutely love them. After giving birth to four good sized boys and as I have gotten older I sometimes have a little leaking problem. These take care of that and they feel good on so I have bought some in almost every color. I also like the Wing Woman bras and have matching sets. I find them comfortable to, which is extremely important to me.
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentSizingRated 2.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeWas this helpful? - Mary M.Verified Buyer3 days agoRated 5 out of 5 starsUltra thin no show French cut
I love the fabric you are now using. The fit is much better than the old style. I would like for you to make these in with a thicker wick.
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentEffectivenessRated 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.