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Culotte garçonne invisible ultra-mince et antifuite

$34.00 CAD

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

Absorbe l'équivalent d'environ 2,5 tampons super

Invisible sous les vêtements

Protection modérée sans l'encombrement

Lavable en machine

Color: Cherry 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

Culotte garçonne invisible ultra-mince et antifuite

Color: Cherry Édition Limitée

Size:

Size:

Culotte garçonne invisible ultra-mince et antifuite

Color: Cherry Édition Limitée

Size:

Size:

Culotte garçonne invisible ultra-mince et antifuite

Color: Cherry Édition Limitée

Size:

Size:

Livraison gratuite pour les commandes de 100 $ et plus

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.

Première paire sans risque pendant 30 jours

Leakproof Underwear, Risk Free

Returns & Exchanges

Holiday Return Policy
Eligible items purchased online or in stores between November 2, 2026 and December 31, 2026 may be returned through January 29, 2027. All other purchases fall under our 30 day Returns Policy.

Standard Return Policy
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 34 Points

Product Description

These underwear feature our buttery soft fabric and offer full coverage for the hips and bum. Great for leak protection, the ultra-thin liner absorbs about the same as 2.5 super tampons or 1 regular pad’s worth. Get the protection you want from periods and light bladder leaks while feeling comfortable and worry-free.

Comfort-First Fit

Mid-rise boybrief silhouette with full bum coverage for a smooth, comfortable fit.

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 your regular underwear.

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 Customers Love UltraThin

TECHNOLOGIE FRESH FIX®

Une protection intégrée qui se fait oublier.

Notre technologie brevetée 360 LeakSeal™ retient les fuites à chaque bord. La doublure ultra-mince absorbe l'équivalent d'environ 2,5 tampons super.

Soft Top Layer

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

4.7
Rated 4.7 out of 5 stars
Based on 201 reviews
91%would recommend these products
ComfortRated 4.8 on a scale of 1 to 5
EffectivenessRated 4.7 on a scale of 1 to 5
FitRated -0.1 on a scale of minus 2 to 2
Keywords
Keywords
Rating
Ratings
Height
Height
How do you use your Leakproof?
How do you use your Leakproof?
Usual Pant Size
Usual Pant Size
201 reviews
  • Rated 5 out of 5 stars
    5 days ago
    Perfect

    These are perfect, great fit, comfortable, cute - definitely needs to come in more colors.

    EA
    Emily A.
    Verified Buyer
    Reviewing
    Leakproof UltraThin™ No-Show Boybrief*
  • Rated 5 out of 5 stars
    1 week ago
    5 Stars

    Loveeee these soo much! Wear this on a regular basis even just for sweat. I have about 10 pairs and will continue to buy more I love these underwear

    S
    Sarah
    Reviewing
    Leakproof UltraThin No-Show Boybrief Black with White Polka Dot / M
  • Rated 5 out of 5 stars
    1 week ago
    Luv it!

    Round behind are perfectly covered with these! Comfortable and zero worries!

    FT
    France T.
    Verified Buyer
    Reviewing
    Leakproof UltraThin™ No-Show Boybrief* Indigo / XL
  • Rated 5 out of 5 stars
    1 week ago
    Such a great upgrade

    Love my new underwear so much comfier than previous pairs. Well worth getting!

    AL
    ANTONIA L.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show Boybrief
  • Rated 5 out of 5 stars
    2 weeks ago
    Leakproof Boyshort

    Very comfortable for me. Not wish there were more colors and patterns t choose from.

    JT
    Jan T.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show Boybrief
  • Rated 5 out of 5 stars
    3 weeks ago
    5 Stars

    Adorable!

    F
    France
    Reviewing
    Leakproof UltraThin™ No-Show Boybrief* Indigo / XL
  • Rated 5 out of 5 stars
    3 weeks ago
    very comfortable

    I love these to wear surprisingly when I work out. No riding up while exercising. Great purchase

    CB
    Carolyn B.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show Boybrief Black / XXL
  • Rated 5 out of 5 stars
    4 weeks ago
    5 Stars

    Love these they’re so comfortable

    T
    Torrance
    Reviewing
    Leakproof UltraThin No-Show Boybrief Black / XS
  • Rated 5 out of 5 stars
    4 weeks ago
    Love the fit!

    The “boy short” panties just fit so nicely.

    DE
    Dianne E.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show Boybrief - Last Call Cheetah Print / L
  • Rated 5 out of 5 stars
    1 month ago
    J'adore !

    Toujours aussi confortable, j' aime beaucoup le modèle avec les pois!!

    SB
    Sylvie B.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show Boybrief Black with White Polka Dot / L
  • Rated 5 out of 5 stars
    1 month ago
    review

    very comfortable

    AB
    Amy-Lyn B.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show Boybrief Warm Sand / XXXL
  • Rated 5 out of 5 stars
    1 month ago
    Love Knix

    I’ve ordered Knix for several years and love them.

    Customer Service always help no matter what the problem

    Is. Great company

    RB
    Rita B.
    Verified Buyer
    Reviewing
    Leakproof UltraThin No-Show Boybrief

Your underwear questions, answered.