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Light Leakproof No-Show Bikini

$25.00 CAD

A free pair on us!

Absorbs about 1 regular tampon

Invisible under clothes

Perfect for daily wear

Machine washable

Claire has 35

Claire has 35" hips and wearing KNIX S

Claire has 35

Claire has 35" hips and wearing KNIX S

Claire has 35

Claire has 35" hips and wearing KNIX S

Claire has 35" hips and wearing KNIX S

Color: Rose Water

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

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 25 Points

Select your pair, add to cart & use your birthday code to redeem.

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

Bikini silhouette with a classic mid-rise fit, medium 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

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

Claire has 35
Claire has 35
Claire has 35

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

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

4.5
Rated 4.5 out of 5 stars
Based on 7,138 reviews
Total 5 star reviews: 5.3k
Total 4 star reviews: 967
Total 3 star reviews: 397
Total 2 star reviews: 206
Total 1 star reviews: 229
Reviews Summary
Customers say these underwear are extremely comfortable and feel like wearing nothing at all. Many appreciate the confidence they provide for light period days, unexpected leaks, and as backup protection. Users frequently mention the no-show design works well under tight clothing without visible lines. Common feedback includes sizing running small, with many recommending sizing up for better fit. Several reviews note the absorbent area could be longer in front for better coverage. While most praise the comfort and effectiveness for light flow, some experienced leaking issues. The fabric is described as soft and high-quality, though a few mention breathability concerns and rigid seams.
91%would recommend these products
ComfortRated 4.6 on a scale of 1 to 5
EffectivenessRated 4.6 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
7,138 reviews
  • Rated 5 out of 5 stars
    Yesterday
    The best - get these!

    This light leakproof is my favorite for every day wear. They do run small so order one size up. But on the other hand, if they feel tight at first, know that they do get larger over time. I used to always order medium but this time I went with large. I think I will stick with large moving forward. I’m so glad I found these because they are very comfortable. It’s the only brand I wear. I weigh 135 and I’m 5’2”. I use them for light leaking, a just in case. Better safe than sorry!

    DR
    Dana R.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    2 days ago
    Perfect protection

    Just want we went in to find. Perfect protection for light days.

    LZ
    Lynn Z.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini 3-Pack - Last Call Zebra/Cobalt/Warm Sand / S
  • Rated 5 out of 5 stars
    2 days ago
    Great fit great price

    Took a chance on this last call and was not disappointed at all. Great fit and does the job.

    JK Profile picture for Jan K.google logo
    Jan K.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini 3-Pack - Last Call Twilight Navy/Blue Light/White / L
  • Rated 5 out of 5 stars
    5 days ago
    Love!

    These people underwear have changed my life. I now have confidence that if I should have a little incontinence, I am covered! My anxiety is gone. And they are really cute and fit perfectly!

    AL
    Ann L.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini 3-Pack
  • Rated 5 out of 5 stars
    6 days ago
    Really nice underwear

    Very comfortable. Love the color.

    PF
    Pamela F.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    1 week ago
    Best Peace of Mind 💖

    I loved these so much I switched all my underwear over to the knix line ☺️ After two children you never know when a sneeze or a hard laugh is going to cause a leak, these give daily peace of mind for the days when not so heavy protection is needed.

    JS Profile picture for Jenna S.google logo
    Jenna S.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini Kit* Cavassa / L
  • Rated 5 out of 5 stars
    1 week ago
    Always great!

    Love the light leakproof as they provide just enough safety in the event of an unwanted dribble.

    TC
    Tamara C.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    1 week ago
    Very Comfortable

    Love these ones. The fit is true to what the sizing guide says. The absorbency is amazing and they are so comfortable

    EC
    Elissa C.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini Midnight / XL
  • Rated 5 out of 5 stars
    1 week ago
    lasted me 8 years

    I bought a few pairs of these when I first got my period at 12, I am now 19 and I am just ready to replace them! They've lasted longer than any underwear and have been used every single period! They're definitely beat up now, but boy did I get my use out of them!

    I
    Izzy
    Verified Reviewer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    2 weeks ago
    Soft kiss.

    I got my 4 sets of bikini light proof no show.

    I tried it for the first time and I love it. It feels so soft, comfortable to wear and keep me dry all day.

    Will be getting more for sure! .

    OA
    Oluwakemi A.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini Black / L
  • Rated 5 out of 5 stars
    2 weeks ago
    The go-to

    These are great. Perform as I expect. I haven’t tested them with the full tampon amount they are for, but that’s a personal preference, I haven’t had any issues for my needs.

    CC
    Cristine C.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    3 weeks ago
    Fantastic pair of undies for a light day

    I wear these on the last day when Im primarily concerned about breakthrough bleeding- no leaks and look great with a pair of leggings

    KB
    Karen B.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini

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