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Home / French Cut Underwear / Leakproof UltraThin No-Show French Cut
Limited Time Offer

Leakproof UltraThin No-Show French Cut

$27.00 CAD

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Absorbs about 2.5 super tampons

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Invisible under clothes

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Moderate protection without the bulk

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Machine washable

| Blue Light
| Blue Light
| Blue Light
| Blue Light
| General
| General
| General
| General
| General

Absorbency: Moderate

Moderate
Drop
Drop
Drop
Drop
Drop
about 2-4 super tampons
Essential
Drop
Drop
Drop
Drop
Drop
No Absorbency
Light
Drop
Drop
Drop
Drop
Drop
about 1-3 regular tampons
Heavy
Drop
Drop
Drop
Drop
Drop
about 4-7 super tampons

Color: Blue Light Limited Edition

Size:

True to Size

•

Size:

Size and Fit Guide

Leakproof Underwear is Sales Tax Free in Canada*
Free Shipping on orders $100+

Shipping

Shipping

Processing Timelines

Please allow 1-2 business days for our warehouse team to pack and ship your order. During peak periods such as sales, holidays and product launches, please allow up to 4 business days for us to process your order.

Delivery Time

For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines vary depending on location and do not include processing times.

Shipping Charges

Orders over $100* CAD = Free Shipping (2-6 business days)

Orders under $100* CAD = $12 CAD Shipping (1-3 business days)

Orders delivering to NWT, Nunavut and Yukon are subject to $20 delivery fee.

*After discounts, before shipping and taxes.
Easy Exchanges within 30 Days

Returns

Returns

Sale & Last Call

Items discounted 30% and below are eligible for size exchange or store credit. Items discounted above 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.

Free Returns

Knix covers the return shipping fees for exchanges and refunds initiated through our Return & Exchange Portal. Exchange orders initiated through our Return & Exchange portal are also eligible for free shipping within the USA and Canada. Please note, the shipping fees on your original order are non-refundable.

Return Policy

Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.
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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

Made from our signature buttery soft fabric with a wide, comfortable waistband. Wear it on its own or under your favorite pajamas.

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Blue Light
| Blue Light
| Blue Light
| Blue Light
| General
| General
| General
| General
| General

How to Choose?

Essential

Drop
Drop
Drop
Drop
Drop
  • • Everyday Wear
  • • No leakproof protection
  • tsp
    0 tsp

Heavy

Drop
Drop
Drop
Drop
Drop
  • • heavy period days
  • • overnight protection
  • • light bladder leaks
  • tsp
    about 8-14 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 4-7 super tampons
  • cup
    about 1.5-3 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • • light period days
  • • sweat
  • • discharge
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

Drop
Drop
Drop
Drop
Drop
  • • moderate period days
  • • light bladder leaks
  • • sweat
  • tsp
    about 4-8 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-4 super tampons
  • cup
    about 0.5-3 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • • extra heavy period days
  • • overnight protection
  • • light bladder leaks
  • tsp
    about 15-20 tsp
  • pad
    about 1.5-2.5 super pads
  • tampon
    about 7-11 super tampons
  • cup
    about 2-3 menstrual cups
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

Soft Top Layer

Gently wicks away moisture while keeping you feeling fresh and odor-free.

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Leakproof UltraThin No-Show French Cut

$27.00 CAD
Buy a Bra, Get Free Ultrathin Undies | Code: FREELEAKPROOF

Color: Blue Light Limited Edition

4.4
Rated 4.4 out of 5 stars
Based on 568 reviews
Total 5 star reviews: 410 Total 4 star reviews: 66 Total 3 star reviews: 41 Total 2 star reviews: 17 Total 1 star reviews: 34
87%would recommend these products
ComfortRated 4.5 on a scale of 1 to 5
EffectivenessRated 4.4 on a scale of 1 to 5
FitRated 0.0 on a scale of minus 2 to 2
Ease of UseRated 4.6 on a scale of 1 to 5
Write a Review (Opens in a new window)
568 reviews
  • Rated 5 out of 5 stars
    10 hours ago
    Love

    I recommend. Comfortable, well-fitting, makes the butt pop. Fun colors. Leakproof.

    Raegan B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    Great undies!

    Okay, so I don’t really need these for period protection as I’m way beyond that these days, but then comes the unexpected surprises when I cough or sneeze. I have, for years, used liners, but with those come a plastic (usually) barrier that doesn’t allow for breatheability, and with that comes itchiness and irritation. Since giving these panties a try, that annoying side effect has decreased tremendously and I feel 1000 times more comfortable! Definitely worth it!

    Jacqui W.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    5 days ago
    Comfy

    Really comfortable and takes care of urgency isdues

    Tanya Y.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Life changer

    This underwear is comfortable and functional! No worries about leaks or a need for disposable products. Wear and wash. I have worn these for several years now and will not go back.

    Diana K.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Good quality. Effective.

    Good quality, comfortable and not noticeable through pants.

    Denise B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    These are super comfortable. Great fit.

    Christie
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Pleasantly Surprised

    I am 5'3" and 150 lbs, normally a pant size 6-8, with a pear-shaped body. I ordered a medium. At first, it's a little snug, but as it stretched (as expected), I was pleasantly surprised at the fit. Nearly NO panty lines under leggings (even in the sun when I'm actively trying to find a panty line). Only a very slight occasional wedgie, considering the cut. I feel confident and comfortable in these and may be a new favorite. I was expecting the high cut to be more in the front, but it's definitely cut higher in the back, which I was surprised to find I like more. It's a french cut with appropriate front coverage.

    For all Knix leakproof underwear I've purchased recently, I wish the front liner went about 1" higher up in the front.

    Emily
    Verified Reviewer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Very comfortable

    Very comfortable love them.

    Michele R.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Felt very comfortable as a backup

    Really liked the product. I paired it with discs to prevent leaks.

    Pamela C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    This cut is very comfortable and flattering

    Carol
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Wonderful!

    Super soft, and they hold a lot of liquid, I haven't experienced any leaks

    Audrey B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    French Cut Ultra Thin

    Love this underwear. They are attractive and provide protection as well. Win Win.

    Susan P.
    Verified Buyer
    Was this helpful?