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Hot Deal 🔥

Teen Leakproof UltraThin Bikini 3-Pack

$52.50 CAD

$75.00

Extra 10% off in cart

Absorbs about 2.5 super tampons

Invisible under clothes

Superior protection without the bulk

Machine washable

| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry

Color: Confetti/Ultra Violet/Raspberry Limited Edition

Size:

True to Size

Size:

Size and Fit Guide

Leakproof Underwear is Sales Tax Free in Canada*
Spend $100, get Free Priority Fulfillment

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.

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 52 Points

Comfort-First Fit

Bikini silhouette with a classic mid-rise fit, medium hip and 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.

Zoom

| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry
| Confetti/Ultra Violet/Raspberry

How to Choose?

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
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

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

4.5
Rated 4.5 out of 5 stars
Based on 4 reviews
Total 5 star reviews: 3 Total 4 star reviews: 0 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 0
75%would recommend this product
ComfortRated 3.8 on a scale of 1 to 5
FitRated -0.3 on a scale of minus 2 to 2
EffectivenessRated 3.8 on a scale of 1 to 5
4 reviews
  • Rated 5 out of 5 stars
    1 month ago
    Great

    Great

    Kalee H.
    Verified Buyer
    Reviewing
    Teen Leakproof UltraThin Bikini 3-Pack
  • Rated 5 out of 5 stars
    7 months ago
    Love the feel

    These are made from a great fabric, appear to be well made and should last for a while.

    Andrea F.
    Verified Buyer
    Reviewing
    Teen Leakproof UltraThin Bikini 3-Pack
  • Rated 5 out of 5 stars
    1 year ago
    Great

    Bought knix teen period underwear for my daughter. Had the wrong size but was able to exchange easily for a size that fits her. She says they are comfortable.

    sarah F.
    Verified Buyer
    Reviewing
    Teen Leakproof UltraThin Bikini 3-Pack
  • Rated 3 out of 5 stars
    6 months ago
    Smaller than expected

    Ordered based off sizing guide but panties all fit much tighter and lower than expected. Not made for girls with a booty unfortunately.

    Ashley M.
    Verified Buyer
    Reviewing
    Teen Leakproof UltraThin Bikini 3-Pack