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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

Front view of model wearing the Light Leakproof No-Show Bikini highlighting the coverage and smooth fit

Claire has 35" hips and wearing KNIX S

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

Claire has 35" hips and wearing KNIX S

Front view of model wearing the Light Leakproof No-Show Bikini highlighting the coverage and smooth fit

Claire has 35" hips and wearing KNIX S

Text on Image: Made with soft, stretchy fabric that's quick dry for your comfort
Text on Image: Wear on their own or as backup protection

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 $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 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 7,167 reviews
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
7,167 reviews
  • Rated 5 out of 5 stars
    4 minutes ago
    Fave underwear!

    Great underwear. My go-tos. Thanks giving as the bday treat!

    CC
    Caroline C.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini Midnight / S
  • Rated 5 out of 5 stars
    Yesterday
    Comfortable Coverage

    I was looking for something as a back up that I could wear to work. It’s gives coverage for accidents and light days and is comfortable and doesn’t show panty lines. Got the three pack and they’re perfect.

    AW
    Ann W.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini 3-Pack Twilight Navy/Damask/Pink Party / S
  • Rated 5 out of 5 stars
    3 days ago
    No-Show Bikini equals No Show Moisture

    I have been using this bikini for years and years.

    I just reordered more to go with my original orders.

    I use them for my gym work outs and travel. I use them

    on work days for times I might sneeze or giggle. For going on walks and wearing light colored pants.

    Not buying daily pads make up for the cost and so much better for the eco system.

    KR
    kris R.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    3 days ago
    Every woman over 50 needs these!

    Comfortable, invisible under clothes, offers a level of protection from silly things that cause leaks (like laughing, sneezing, standing up, etc)! I wish there were more colors!

    MM
    Maggie M.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    5 days ago
    Happy

    Happy

    WF
    Wendy F.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini 3-Pack Twilight Navy/Damask/Pink Party / S
  • Rated 5 out of 5 stars
    5 days ago
    New Favourite!

    I have several thong from Knix, which I love, but I thought I'd change it up for winter. These No-Show Bikini's are now my new favourite.

    KT
    Kate T.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini Rose Water / S
  • Rated 5 out of 5 stars
    1 week ago
    so comfortable bikini

    These are my most comfortable underwear I have ever worn. They don't ride up and they don't show through. I have been wearing for a few years now and have not found any other underwear to deliver such comfort

    BW
    Brenda W.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini 3-Pack Twilight Navy/Damask/Pink Party / S
  • Rated 5 out of 5 stars
    1 week ago
    Great

    Great

    BB
    Bonnie B.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini 3-Pack
  • Rated 5 out of 5 stars
    2 weeks ago
    Leakproof no-show bikini

    I love this product, I’ve been wearing this brand for years. They are way better than other brands. I have tried because the crotch area doesn’t go halfway up your bum, so therefore it doesn’t show through leggings.

    DL
    Deborah L. H.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    2 weeks ago
    Discreet

    Takes the worry out of bladder leaks.

    AC
    Amy C.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    2 weeks ago
    Rutten Review

    I like them. Just wish I would have ordered briefs.

    MR
    Marie R.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini
  • Rated 5 out of 5 stars
    2 weeks ago
    Love these panties

    I have several pairs of these, and they are very comfy. I'm in menopause so don't have to worry about periods, but they are great for light leaks and to stay fresh. They fit true to size, and don't ride up.

    LM
    Leanne M.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Bikini

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