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KnixTeen

Teen Leakproof UltraThin No-Show Bikini 3-Pack

$65.00 CAD

$75.00

Save $10

Absorbs about 2.5 super tampons

Invisible under clothes

Superior protection without the bulk

Machine washable

Front view of model wearing the Teen Leakproof UltraThin No-Show Bikini highlighting the coverage and smooth fit
Teen Leakproof UltraThin No-Show Bikini 3-pack shown front-facing against a light gray background

Color: Black

Size:

True to Size

•

Size:

Size and Fit Guide

Leakproof Underwear is Sales Tax Free in Canada*
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 65 Points

Product Description

Hanging out or running to your next class? These period undies provide the ultimate comfort you want, plus ultra-thin protection you need from sweat, discharge and leaks. It’s a classic silhouette made with a super soft-and-stretchy, quick-drying material. It absorbs about the equivalent of 2.5 super tampons for an extra dose of confidence on those medium-flow days.

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 your regular underwear.

Zoom

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.

5.0
Rated 5.0 out of 5 stars
Based on 31 reviews
100%would recommend this product
ComfortRated 4.8 on a scale of 1 to 5
FitRated -0.1 on a scale of minus 2 to 2
EffectivenessRated 4.7 on a scale of 1 to 5
Keywords
Keywords
Rating
Ratings
Height
Height
Usual Teen Pant Size
Usual Teen Pant Size
How do you use your Leakproof?
How do you use your Leakproof?
31 reviews
  • Rated 5 out of 5 stars
    2 months ago
    Great fit, great teen protection

    My daughter loves hers and wanted more of them. I’d highly recommend this for teen girls.

    LL
    Lisa L.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 months ago
    5 Stars

    Love these!

    J
    Jessica
  • Rated 5 out of 5 stars
    4 months ago
    Great for autistic tween

    These are great for a child with special needs who gets overwhelmed with period products.

    KB
    Kelly B.
    Verified Buyer
  • Rated 5 out of 5 stars
    5 months ago
    Loved by my 11 year old!

    This review is based on my 11 year old's comments when I've asked. She loves them! We are placing another order already for nude colour so that she can wear them for her dance competitions.

    MF
    Michelle F.
    Verified Buyer
  • Rated 5 out of 5 stars
    6 months ago
    5 Stars

    My daughter loves the bathing suit

    J
    Jeanine
  • Rated 5 out of 5 stars
    7 months ago
    Love

    Got these for my daughter who is 11 and started her period she loves them . Wish they had these when I was kid

    CE
    Coral E.
    Verified Buyer
  • Rated 5 out of 5 stars
    7 months ago
    Work great

    I bought these for my 12 year old daughter and she loves them. They fit great and have great absorbency.

    MY
    Michelle Y.
    Verified Buyer
  • Rated 5 out of 5 stars
    7 months ago
    Lifesaver

    Thin but well built. Gusset had adequate coverage for night and great for most period days.

    HH
    Hilary H.
    Verified Buyer
  • Rated 5 out of 5 stars
    7 months ago
    Super comfy

    Incredibly comfortable. High quality. Great product.

    MT
    Maya T.
    Verified Buyer
  • Rated 5 out of 5 stars
    8 months ago
    happy teen

    leak proof! confident teen! happy to not have to wear bulky pads anymore!

    TS
    Tiffany s.
    Verified Buyer
  • Rated 5 out of 5 stars
    9 months ago
    Love Knix

    Love these underwear!! Knix is all I wear

    MM
    Melanie M.
    Verified Buyer
  • Rated 5 out of 5 stars
    10 months ago
    5 Stars

    J'utilise les Knix depuis environ 5 ans et je n'ai pas hesité à en offrir à ma fille. Les culottes sont confortables et le tissu ne tâche pas. Je les adore!

    I
    Isabelle