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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: 426 Total 4 star reviews: 70 Total 3 star reviews: 38 Total 2 star reviews: 17 Total 1 star reviews: 34
What our customers are saying
Generated by AI from 100 most recent customer reviews
Last updated 4 days 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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585 reviews
- Rated 5 out of 5 stars4 minutes agoUltra thin french cut
Good for going out in a special occasion.
Kelly M.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars3 days agoThis cut is EVERYTHING
This was my first pair of period underwear and I’m truly obsessed. The material, the no show design…the FIT. Somehow free bleeding also feels sexy. I’m truly obsessed and bought two more pair just a few days after trying them. LOVE THESE.
Julianne A.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars4 days agoFrench cut
Good coverage, very comfortable and leakproof as advertised
bev w.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars5 days agoFlattering and effective
Bought 2 of these to see how they’d work/fit, definitely purchasing more!
Kaya M.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars6 days agoLeakproof Ultra Thin French Cut
Although they are cut a little higher than I like, these underwear are amazingly comfortable and absorbent! I have no worries about leaks when wearing them!
Dawne M.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars1 week agoKnix
Perfect fit comfortable, feel confident
Janice M.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars1 week agoLove them
They are nice and discreet..
Andrea K.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars2 weeks agoGreat purchase
Great fit, protection, and I love the ultra thin material
Bethany H.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars2 weeks agoFavorite fit
Love these! Fit great and very comfortable
Robyn J.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars3 weeks agoLove my French Cut
I adore these underwear. I never need to worry if I’m going to leak in public when I have them on, yet I don’t even feel like I’m wearing anything! They come in fun colors too. Thank you!!
Sheree W.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars3 weeks agoAwesome
Love everything Knix and these undies are no exception. Comfort and effective!
Renée V.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut - Rated 5 out of 5 stars3 weeks agoThe perfect fit
Occasionally, I will wear a higher cut but the French cut is really the perfect compromise. Enough tummy coverage yet doesn’t feel too “ granny pant”. Add in the leakproof to absorb some of those yucky things, and it is the perfect panty!
Denise S.Verified BuyerReviewingLeakproof UltraThin No-Show French Cut
