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Leakproof UltraThin No-Show French Cut
Leakproof UltraThin No-Show French Cut
$27.00
USD
Buy 3+ Save 15%, Buy 5+ Save 20%
Absorbs about 2.5 super tampons
Invisible under clothes
Moderate protection without the bulk
Machine washable
Size and Fit Guide
How to Measure
In order to select the correct sizing, we recommend you take the following measurements using a soft tape measure. If necessary, ask someone else to help.
Waist
Measure around the narrowest part of your torso, usually just above your belly button. Keep the tape snug and level, but not tight. The number where it meets is your waist measurement.
Hip
Stand with your feet together and measure around the fullest part of your hips and buttocks. Keep the tape level and snug, but not tight. The number where it meets is your hip measurement.
Build Your 3-Pack
Leakproof UltraThin No-Show French Cut
Leakproof UltraThin No-Show French Cut
Leakproof UltraThin No-Show French Cut
Rewards Members Earn
27 Points
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Product Description
Comfort-First Fit
A classic mid-rise silhouette that provides medium bum coverage.
Worry-Free Protection
Our newest leakproof innovation provides more absorbency without the bulk. Patented 360 LeakSeal™ technology locks in leaks at every edge.
Moderate Absorbency
Absorbs 2.5 super tampons worth of liquid—perfect for moderate flow days, light bladder leaks, and sweat. The carbon cotton gusset top layer keeps you dry.
No-Show Style
Buttery-soft and smooth fabric gives a seamless look and feel. Disappears under clothes, even leggings.
Easy to Wash
Machine washable just like regular underwear.
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How to Choose?
Essential
- • Days you don’t need leak protection. Everyday freshness and moisture wicking.
-
0 tsp
Heavy
- • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
-
about 8-14 tsp
-
about 1.5-3 regular pads
-
about 4-7 super tampons
-
about 1.5-3 menstrual cups
Light
- • Daily freshness. For sweat, discharge, period spotting, or backup protection.
-
about 1-3 tsp
-
about 1-3 pantyliners
-
about 1-3 regular tampons
-
about 0.5 menstrual cups
Moderate
- • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
-
about 4-8 tsp
-
about 1-1.5 regular pads
-
about 2-4 super tampons
-
about 0.5-3 menstrual cups
Ultra
- • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
-
about 15-20 tsp
-
about 1.5-2.5 super pads
-
about 7-11 super tampons
-
about 2-3 menstrual cups
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FRESH FIX TECHNOLOGY®
Built-in protection that feels like nothing at all.
Our patented 360 LeakSeal™ technology locks in leaks at every edge. The ultra-thin liner absorbs about 2.5 super tampons worth of liquid.
Soft Top Layer
Middle Layer
Leakproof Layer
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How to wash
Knix underwear is 100% reusable and machine washable, just like your regular undies.
Not required. But for best results, you can rinse your leakproof with cold water in the tub or sink before washing.
Machine wash on a cold, gentle cycle with mild detergent.
For their longest life, air drying is best. Hang or lay flat to dry.
Fabric softeners, bleach, ironing, or heat from the dryer.
Total 5 star reviews: 438 Total 4 star reviews: 70 Total 3 star reviews: 38 Total 2 star reviews: 17 Total 1 star reviews: 36
What our customers are saying
Generated by AI from 100 most recent customer reviews
Last updated 2 weeks ago
Customers say these French cut underwear are comfortable, soft, and provide effective protection without visible lines under clothing. Many appreciate the ultra-thin design that feels like regular underwear while offering reliable coverage. Users frequently mention the smooth, satiny feel and no-show appearance. Some find the fit runs small or note that the cut sits higher than expected, particularly in the back. Several customers report issues with the material stretching too much or creating wedging. Common feedback includes praise for the comfortable fit and discreet protection, though some mention concerns about durability and sizing consistency. Many customers become repeat purchasers, finding them ideal for daily wear.
87%would recommend this product
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599 reviews
- Rated 1 out of 5 stars22 seconds agoNot what I expected
Do not feel the underwear provide what is advertised. Do not feel confident wearing them.
Kathleen S. F.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 starsYesterdayEveryday comfort
I've ordered knix for the past few years, they are comfy, and generally effective! I love the light days for sweaty summer days!
Marilyn L.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 1 out of 5 stars2 days agoSo disappointed!
They definitely did not do what they were designed to do. They leaked everywhere. The French cut design is uncomfortable & unflattering.
Erica D.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars2 days ago5 Stars
Comfortable and true to color.
KatrinaReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars2 days ago5 Stars
Comfortable and true to color.
KatrinaReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars4 days agolight weight
The no show French cut with medium leakproof is very light weight and super comfortable.
Terri M.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars5 days agoComfortable!
These surpassed my expectations. They are amazing and so comfortable.
Amanda E.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars6 days agoQuality Item
My first pair and I am very happy with the fit and quality construction. I will be buying more.
Carol R.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars1 week agoMy Best Ever
I love the soft stretchable fabric.I especially love the hi cut of the leg area.
I t is super comfortable and does exactly what I expectTHANK YOU KNIX.BB.
barbara b.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars1 week agoGreat fit
Love my Knix underwear!!!
Shelley M.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars1 week agoMy favorite panties
Love the fit and confidence they provide.
Martha E.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars1 week agoHelp staying DRY
I find the French cut leakproof panties to be comfortable and effective with small leaks. I recommend them for every day and at night.
Anita C.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut
