Skip to content

Menu

Your Bag

Your cart is empty

But you're full of potential..

Rewards Members Earn 0 Points
Bundle Deal

Light Leakproof No-Show Bikini 3-Pack

$60.00 CAD

$75.00

Save $15
Checkmark

3-pack underwear

Checkmark

Absorbs about 1 regular tampon

Checkmark

Invisible under clothes

Checkmark

Perfect for daily wear

Checkmark

Machine washable

| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White

Color: Twilight Navy/Blue Light/White Limited Edition

Size:

True to Size

Size:

Size and Fit Guide

Leakproof Underwear is Sales Tax Free in Canada*
Free Shipping on orders $100+

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

Leakproof Underwear, Risk Free
Trying leakproof underwear for the first time? Your first pair is completely risk free for 30 days. Wear them, wash them, and see how they work for your body. If they’re not right for you, we’ll refund your first pair. Prefer a different size or style? We also offer free exchanges.

How it works:

  • Risk free applies to leakproof underwear on your first order
  • Refund covers the item price (original shipping excluded)
  • Just email info@knix.com and we’ll take care of you

Return Policy
Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.

Rewards Members Earn 60 Points

Product Description

So thin, you’ll forget you’re wearing anything. This style has medium bum and hip coverage. Our original leakproof technology offers a barely-there feel while absorbing about 1 regular tampon or pantyliner worth of liquid. Patented bonded edges help prevent against side leaks. These underwear feature our signature buttery soft fabric. No show construction is designed to be invisible under clothes, including workout leggings.

Comfort-First Fit

Boyshort silhouette with a mid-rise fit and extra hip and bum coverage.

Worry-Free Protection

Our original leakproof technology provides a barely noticeable feel. Patented bonded edges help prevent side leaks.

Light Absorbency

Absorbs 1 regular tampon worth of liquid—perfect for light flow days, sweat and discharge, and backup protection for heavy flow days.

No-Show Style

Made from our signature buttery soft fabric with a wide, comfortable waistband. Wear it on its own or under your favorite pajamas.

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White
| Twilight Navy/Blue Light/White

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
PATENTED LEAKPROOF TECHNOLOGY

Built-in protection that feels like nothing at all

Our original Fresh Fix Technology® features a built-in absorbent liner absorbing about 1 regular tampon worth of liquid so you feel fresh and in-control.

Soft Top Layer

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 7,034 reviews
Total 5 star reviews: 5.3k Total 4 star reviews: 957 Total 3 star reviews: 393 Total 2 star reviews: 200 Total 1 star reviews: 223
91%would recommend these products
ComfortRated 4.7 on a scale of 1 to 5
EffectivenessRated 4.6 on a scale of 1 to 5
FitRated -0.0 on a scale of minus 2 to 2
Ease of UseRated 4.6 on a scale of 1 to 5
7,034 reviews
  • Rated 5 out of 5 stars
    22 hours ago
    AWESOME!

    Love, Love, Love these underwear! Thank you, to the designer of these underwear.

    Patricia S.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Leakproof comfort

    I bought these and the first pair I put on felt small. I have some other knix with a thicker liner that feel larger when I wear them. They stretched out through the day and felt great after about an hour. I've washed them a few times and they are very comfortable. I'm a runner and do yoga so these are great for moving in all positions.

    Rose S.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    évaluation sous vêtement

    Entièrement satisfaite

    Marie S.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Wow

    Honestly, I’ve created a monster with my daughter. She refuses to wear anything but Knix underwear! It gives me peace of mind having the leakproof underwear as she ages!

    Alisha G.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Leakproof wins

    When I wear these underwear I am comfortable and feel more confident for any time I may need a little extra coverage.

    Lorna H.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    So far so good

    So far my little leaks have been contained !

    Barb D. N.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Comfortable

    Super comfy and cute, will absolutely buy again!

    Elissia D.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Comfort has a new name

    Great for gym days. Comfort and discretion under gym clothes.

    Adina R.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Comfortable

    Love these underwear for daily use. I have an IUD so never know when I’ll spot so these make me confident all day.

    Kristin I.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Magic!

    I don't know how they work, but love these undies! They are 100% leak proof!! I bought the medium and may size up next time as I feel they're a bit tight around the tops of my thighs - but not uncomfortable! I will definitely purchase more pairs!

    Danielle G.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Love them!

    I absolutely love everything about them ! They feel like your wearing nothing, so comfortable yet effective

    Cora Y.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Teen Light Leakproof

    I bought a three pack as it was a great sale deal! I am 65+ years old, normally wear a size 2 pant and weigh slightly under 100 #.

    By using the size and fit guide chart for adult pant size, I bumped up a size and chose the M size. They fit me perfect and are very comfortable.

    I have very minimal bladder leak, so can't necessarily judge their leakproof performance.

    Isabel N.
    Verified Buyer