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New Innovation

Slip invisible en coton sans coutures et étanche

$32.00 CAD

Achetez 3 et plus, économisez 15 %, achetez 5 et plus, économisez 20 %

Absorbe l'équivalent d'environ 6 tampons super

Coton respirant

Plus d'absorption sans l'épaisseur

Lavable en machine

Color: Periwinkle Édition Limitée

Size:

Taille conforme

•

Size:

Size and Fit Guide

Les sous-vêtements antifuites sont exempts de taxe de vente au Canada*

Créez votre lot de 3

Slip invisible en coton sans coutures et étanche

Color: Periwinkle Édition Limitée

Size:

Size:

Slip invisible en coton sans coutures et étanche

Color: Periwinkle Édition Limitée

Size:

Size:

Slip invisible en coton sans coutures et étanche

Color: Periwinkle Édition Limitée

Size:

Size:

Free Shipping on orders $125+

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 $125* CAD = Free Shipping (2-6 business days)

Orders under $125* 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.

First Pair Risk Free for 30 Days

Leakproof Underwear, Risk Free

Returns & Exchanges

New to leakproof? Your first pair is risk free for 30 days. Wear them, wash them, and see how they work for your body. Not right for you? We'll refund the item price (original shipping excluded). Prefer a different size or style? We also offer free exchanges. Just email info@knix.com and we'll take care of you.

Purchased leakproof before? Within 30 days of delivery you can exchange for another size, style, or store credit. We're unable to provide refunds on underwear. If you ordered multiple pairs, please open, wash, and wear one pair only before initiating an exchange.

Still have questions? View our full policy here.

Rewards Members Earn 32 Points

Product Description

Introducing our softest cotton-blend underwear, upgraded with invisible seam construction and built-in leakproof protection. The Leakproof Invisible Cotton No-Show Brief features a comfortable high rise and full coverage designed to stay smooth under any outfit. Crafted with a cotton-blend body and a discreet leakproof liner that absorbs about 2 super tampons for all-day confidence. Perfect for everyday period backup, light bladder leaks, and sweat protection.

High-Rise, Full Coverage

Designed with an elevated rise and full bum coverage for a secure, supportive feel.

Invisible, No-Dig Finish

Innovative bonded seam design lays flat against your skin for a no-show finish under clothing.

Moderate Absorbency

Absorbs about 2 super tampons worth of liquid—great for moderate flow days, light bladder leaks, and sweat.

Soft Cotton Blend

Made with a soft cotton-blend body fabric for the everyday comfort you love.

Zoom

Comment choisir ?

Essential

  • • Days you don’t need leak protection. Everyday freshness and moisture wicking.
  • tsp
    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.
  • 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

  • • Daily freshness. For sweat, discharge, period spotting, or backup protection.
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

  • • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
  • 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

  • • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
  • 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
OUR NEWEST INNOVATION IS HERE

COTTON. SEAMLESS. LEAKPROOF.

Impossible. Until now.

Cotton-Blend Comfort

Soft cotton-blend fabric delivers natural softness and the familiar, all-day comfort of your favorite everyday underwear.

3.9
Rated 3.9 out of 5 stars
Based on 13 reviews
69%would recommend this product
ComfortRated 4.2 on a scale of 1 to 5
EffectivenessRated 4.4 on a scale of 1 to 5
FitRated -0.5 on a scale of minus 2 to 2
Keywords
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Rating
Ratings
Height
Height
How do you use your Leakproof?
How do you use your Leakproof?
Usual Pant Size
Usual Pant Size
13 reviews
  • Rated 5 out of 5 stars
    50 minutes ago
    Ms

    Very comfortable! They work great for bladder leaks!

    BD
    Brenda D.
    Verified Buyer
  • Rated 5 out of 5 stars
    Yesterday
    Excellent propuct

    Certainly are 100% of their description

    SC
    Sandra C.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 days ago
    Amazing

    Love these , my new favourite !!

    KG
    KATHY G.
    Verified Buyer
  • Rated 5 out of 5 stars
    5 days ago
    leak proof. cotton briefs

    very lightweight by also super effective. luv them.

    TB
    Theresa B.
    Verified Buyer
  • Rated 5 out of 5 stars
    6 days ago
    panties

    comfortable

    TB
    Trudy B.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    New cotton no shoe brief

    Very comfortable, I thought they might be a little low riding since I’m used to French cut but they’re perfect.

    CH
    Cheryl H.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Been waiting for non slippery knix!

    Runs one full size smaller than I wear in other knix styles. I usually wear medium, I needed large in this for sure. So far so good! Leggings stay up when wearing these, fairly invisible, I wish the pad was the lighter absorbency or less obvious in the rear.

    IC
    Isabel C.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    These undies are soooo comfy!!

    I wasn't too sure what to think about buying cotton undies from Knix but thought I'd give them a try and I love them. So comfortable, such a nice fit. I bought two colours and will continue to buy them.

    AS
    Anne S.
    Verified Buyer
  • Rated 4 out of 5 stars
    2 days ago
    Leakproof Cotton No-Show Brief

    This is my first time trying the Cotton No show Brief. They are very comfortable and are certainly no-show. I wear a size L in all my Knix underwear but had to exchange my unworn size L for XL. I ordered these online and had to make a trip into the city to do this exchange. As always, I get great service there, just

    inconvenient.

    LZ
    Lorraine Z.
    Verified Buyer
  • Rated 3 out of 5 stars
    18 hours ago
    Thought they were high rise

    For some reason I thought these were high rise cotton but they aren’t. I do like the fabric though.

    EL
    Emily L.
    Verified Buyer
  • Rated 2 out of 5 stars
    1 week ago
    Wish they were true high-rise

    These are super luxe feeling and love that they are cotton but they don’t fit as a true high rise. Please make these in the same style as your other leakproof options!

    KS
    Katrina S.
    Verified Buyer
  • Rated 1 out of 5 stars
    Yesterday
    Disappointing fit

    I have been buying leakproof panties from Knix for years and loved my old cotton panties. I thought I'd try the new ones. I ordered my usual medium size and it fits very skimpy and the coverage is disappointing. So is the comfort. I ordered 5 pairs and washed and wore one pair and do not like them at all. I plan to return the other 4.

    SS
    Sheila S.
    Verified Buyer

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