Aller au contenu Accessibility Statement

Shop by Category

Shop by Price

Shop by Style

More Ways to Shop

Leakproof Quiz
Why Knix Leakproof Works

Bras

More Ways to Shop

Bra Quiz
Bras: Buy 2 & Save 15%

Swim

ACOTAR™ x Knix

New & Trending

New Arrivals
Gift Guide
Bras: Buy 2 & Save 15%
15% off Knix HQ Picks

Votre sac

Votre panier est vide

Mais vous êtes plein de potentiel..
Create an account to join Club Knix and earn points on this order

Suggestions

Nos préférés

Super Anti-Fuites® Boxer Rêve™

$48.00 CAD
Achetez plus, économisez plus

Color: Midnight/Cherry Polka Dot Édition Limitée

+5

Culotte bikini invisible UltraFine anti-fuites

$27.00 CAD
Achetez plus, économisez plus

Color: Cherry Édition Limitée

+4

Dream Short™ Super Anti-fuites®

$35.70 CAD
$42.00
Achetez plus, économisez plus

Color: Black

+5

Mini boxer Super anti-fuites® Dream

$48.00 CAD
Achetez plus, économisez plus

Color: Red & White Stripe Édition Limitée

+6
Accueil / Culottes menstruelles pour adolescentes / Caleçon en coton anti-fuite pour adolescente
KnixTeen

Caleçon en coton anti-fuite pour adolescente

$35.00 CAD

Nouveau

Absorbe l'équivalent d'environ un tampon normal

Mélange de coton confortable

Conçu pour un usage quotidien et les flux légers

Lavable en machine

Capacité d'absorption: Light

Color: Heather Grey Édition Limitée

Size:

Taille conforme

•

Size:

Size and Fit Guide

Les sous-vêtements antifuites sont exempts de taxe de vente au Canada*
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.
Votre 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 35 Points

Comfort Meets Confidence

A full-coverage style that stays in place, no matter what’s on the agenda. Designed specifically for teens and tweens, so may fit smaller than styles made for adults.

Made for Everyday Wear

Comfy, cotton, and light absorbency means it’s the pair they’ll reach for everyday, no matter the occasion.

Oops-Proof

Absorbing about 1 regular tampon worth makes it perfect for just-in-case moments and light flows.

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

Découvrir les meilleures ventes pour ados

Boxer de pyjama Super Anti-fuites® pour ados

$45.00 CAD
Achetez plus, économisez plus

Color: Blue Stripe

+2

Lot de 3 slips de bikini invisibles ultra-fins anti-fuites pour adolescentes

$65.00 CAD
$75.00
Économisez 10 $

Color: Black

+4

String ado imperceptible ultra-fin étanche

$25.00 CAD
Achetez plus, économisez plus

Color: Bluebell Édition Limitée

+4

Bas de maillot de bain menstruel pour adolescente

$55.00 CAD

Color: Black

+1

Shorty pyjama super absorbant Super Leakproof® pour ado

$45.00 CAD
Achetez plus, économisez plus

Color: Night Sky Édition Limitée

Kit premières règles pour adolescentes - Bikini

From 
$145.00 CAD
$193.00
Économisez 49 $

Kit d'urgence règles pour ado - Shorty

From 
$40.00 CAD
$47.00
3.5
Rated 3.5 out of 5 stars
Based on 2 reviews
50%would recommend this product
ComfortRated 3.5 on a scale of 1 to 5
FitRated 0.0 on a scale of minus 2 to 2
EffectivenessRated 4.5 on a scale of 1 to 5
Search
Search Reviews
Rating
Ratings
Height
Height
Usual Teen Pant Size
Usual Teen Pant Size
How do you use your Leakproof?
How do you use your Leakproof?
Write a Review (Opens in a new tab)
2 reviews
  • Rated 4 out of 5 stars
    3 minutes ago
    elastic band

    The elastic band around the waist should be a thicker.

    JT
    Joy T.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    1 week ago
    Teen boxers

    Not my fit will try something else next time I think! Lace itchy!

    MB
    Marilynn B.
    Verified Buyer
    Was this helpful?

Shop by Category

Shop The Holiday Shop

The Holiday Shop

Shop Underwear

Underwear

Shop Bras

Bras

Shop Apparel

Apparel

Shop Shapewear

Shapewear

Shop Sleep

Sleep

Shop ACOTAR™

ACOTAR™

Shop Holiday Dressing

Holiday Dressing

Shop Swim

Swim

Shop Accessories

Accessories

Shop Teen

Teen

Shop Men

Men