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Light Leakproof Bikini

$17.50 CAD

$25.00

30% off
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Absorbs about 1 regular tampon

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Invisible under clothes

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Perfect for daily wear

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Machine washable

| Rose Water
Claire has 35

Claire has 35" hips, 24" waist and wears a Knix size S

Claire has 35

Claire has 35" hips, 24" waist and wears a Knix size S

Claire has 35

Claire has 35" hips, 24" waist and wears a Knix size S

Made with soft, stretchy fabric that’s quick dry for your comfort  | General

Made with soft, stretchy fabric that’s quick dry for your comfort

Wear on their own or as backup protection | General

Wear on their own or as backup protection

Washes just like regular underwear | General

Washes just like regular underwear

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.

Black Friday Return Policy

Returns

Returns
Black Friday Sale & Last Call

Items discounted at 30% or below are eligible for a size exchange or store credit. Refunds are not available for these items. Items discounted above 30% are considered final sale and are not eligible for refunds, store credits, or exchanges. Items marked “Clearance” are also final sale and cannot be returned, exchanged, or refunded. No exceptions.

Rewards Members Earn 17 Points

"...the most comfortable period underwear I've ever tried."

- Good Housekeeping

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 regular underwear.

Zoom

| Rose Water
Claire has 35
Claire has 35
Claire has 35
Made with soft, stretchy fabric that’s quick dry for your comfort  | General
Wear on their own or as backup protection | General
Washes just like regular underwear | General

How to Choose?

Essential

Drop
Drop
Drop
Drop
Drop
  • Everyday Wear
  • No leakproof protection
  • tsp
    0 tsp

Heavy

Drop
Drop
Drop
Drop
Drop
  • heavy period days
  • overnight protection
  • light bladder leaks
  • 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

Drop
Drop
Drop
Drop
Drop
  • light period days
  • sweat
  • discharge
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

Drop
Drop
Drop
Drop
Drop
  • moderate period days
  • light bladder leaks
  • sweat
  • 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

Drop
Drop
Drop
Drop
Drop
  • extra heavy period days
  • overnight protection
  • light bladder leaks
  • 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.

4.0
Rated 4.0 out of 5 stars
Based on 6 reviews
Total 5 star reviews: 4 Total 4 star reviews: 0 Total 3 star reviews: 1 Total 2 star reviews: 0 Total 1 star reviews: 1
83%would recommend this product
6 reviews
  • Rated 5 out of 5 stars
    1 month ago
    Comfortable

    Very comfortable for everyday wear

    Sarah M.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Comfort meets function

    These are so comfortable and provide panty-liner security. Love them!

    Sharlene T.
    Verified Buyer
  • Rated 3 out of 5 stars
    5 months ago
    Love the Vision, But Sizing Needs Work for Curvier Girls

    As a catastrophe adjuster who moves a LOT and as a curvier, bottom-heavy girl, I was excited to try Knix’s leakproof underwear for comfort, protection, and peace of mind during long work days. I ordered both the Leakproof No-Show Bikini (L) and the Leakproof Dream Shorts, and here’s the real tea:

    No-Show Bikini (L):

    I sized up from my usual Medium to a Large, hoping for that just right fit—not too tight where leaks could escape, but not too loose either. The fit was okay at first and it did stretch a bit with movement. But here’s the issue: the bikini cut didn’t work well for my fuller bum and thighs. It gave that “double-cheek” effect with spillage not a dealbreaker, but definitely not ideal for someone active and curvy. I’ve since exchanged for an XL and am hoping it won’t loosen up too much with wear.

    Final Thoughts:

    I love what Knix is doing and see the huge potential, especially for active women. Just be mindful that the sizing is inconsistent between styles—especially if you’re curvy or in a physically demanding job. Still a fan, just waiting for that perfect fit!

    Keiarra H.
    Verified Buyer
  • Rated 1 out of 5 stars
    1 year ago
    Definitely not no-show and gusset too small

    I bought 3 pairs of light underwear and they kept sending me medium absorbency. Also, the gusset is very short and doesn’t provide protection in the front. Lastly, they are definitely not no-show. You can totally see the lines under tight pants.

    Dayna
    Verified Buyer
  • Rated 5 out of 5 stars
    2 years ago
    Thanks so much

    I have just tried these out and am so grateful to have them and to not need to create more waste using tampons and liners.

    Beth
    Verified Buyer
  • Rated 5 out of 5 stars
    2 years ago
    Super comfortable

    This underwear is a game-changer for periods. It’s super comfortable, it doesn’t move throughout the day, and I haven’t had any spillage. I’ve had mine for over a year now and the fabric still looks good after so many washes. They’re true to the size chart on Knix’s website. I highly recommend!

    Lauren
    Verified Buyer