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Color: Black
Best Seller

Color: Black

Size:

Size:

Size and Fit Guide

Mix & Match: 3+ for $20 each
Rewards Members Earn 0 Points
Best Seller

Super Leakproof® No-Show Boyshort

$32.00 CAD

Mix & Match: 3+ for $25 each
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Absorbs about 4 super tampons

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Invisible under clothes

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Extended gusset for extra protection

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Machine washable

| Warm Sand
| Warm Sand
| Warm Sand
| General
| Warm Sand
| General

Color: Warm Sand

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.

Easy Exchanges within 30 Days

Returns

Returns
Free Returns

Knix covers the return shipping fees for exchanges and refunds initiated through our Return & Exchange Portal. Exchange orders initiated through our Return & Exchange portal are also eligible for free shipping within the USA and Canada. Please note, the shipping fees on your original order are non-refundable.

Return Policy

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

Sale & Last Call

Items discounted below 30% are eligible for size exchange or store credit. Items discounted 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.

Rewards Members Earn 32 Points

Comfort-First Fit

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

Worry-Free Protection

Patented bonded edges help prevent side leaks.

Heavy Absorbency

Absorbs 4 tampons worth of liquid—perfect for heavy flow days, overnight protection, and light bladder leaks.

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

| Warm Sand
| Warm Sand
| Warm Sand
| General
| Warm Sand
| 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
    6-11 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 3-6 super tampons
  • cup
    about 1-2 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • light period days
  • sweat
  • sweat and 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 3-6 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-3 super tampons
  • cup
    about 0.5-1 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • extra heavy period days
  • overnight protection
  • light bladder leaks
  • tsp
    13-17 tsp
  • pad
    3.5-4.5 regular pads
  • tampon
    7-9 super tampons
  • cup
    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 4 super tampons 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.

4.6
Rated 4.6 out of 5 stars
Based on 2,993 reviews
Total 5 star reviews: 2.3k Total 4 star reviews: 361 Total 3 star reviews: 117 Total 2 star reviews: 82 Total 1 star reviews: 95
92%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 0.1 on a scale of minus 2 to 2
Ease of UseRated 4.6 on a scale of 1 to 5
2,993 reviews
  • Rated 5 out of 5 stars
    4 minutes ago
    love these

    the heavy is excellent for overnight, the cut makes them feel super secure without being too bulky, the fabric is very comfortable stretchy but secure.

    Hils
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    I have’d several pairs over the years and love them! Very easy to wash and they hold up… no tearing after the first wash!

    Anna
    Verified Buyer
  • Rated 4 out of 5 stars
    2 weeks ago
    Nice fit

    My first time try Knix. They are a lot more comfortable than I expected. I have a really heavy flow. I haven't tried it on a heavy flow day as yet. The day I did wear it it did the job.

    Roxanne R.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Super Leakproof No Show Boyshort

    Loved the style, fit and color.

    Mary J. D.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Love these!

    Just placed my second order. They are a little pricey, but worth every penny.

    Sierra S.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    No more leaks!

    Comfortable & effective!

    Linda G.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Feel Confident wearing these

    These underwear leave me feeling confident for potential bladder leaks, and also absorbs sweat very well!

    Kim M.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Great product

    Love the way they feel and fit

    Wendy M.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    so comfortable

    I love these. Super soft and comfy, even on heavy days. They don't leak and waaaaay better than a pad!

    CYNDI C.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    New style for me

    The boy short stayed in place…does not ride up on me. Love them

    Christa L.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Super leakproof no show boyshort

    Very comfy. Love the smooth feel material.

    Nancy G.
    Verified Buyer
  • Rated 3 out of 5 stars
    1 month ago
    Super leakproof no shoe boyshory

    The panty is nice but my complaint they are one size too big

    My size is large and I ordered Xl. Can I exchange them.

    Berta D. L. R.
    Verified Buyer