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Color: Warm Sand
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Color: Warm Sand

Size:

Size:

Mix & Match: 3+ for $25 each
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Leakproof Cotton Boybrief

$35.00 CAD

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

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Cotton comfort

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More absorbency without bulk

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Machine washable

| Mushroom
| Mushroom
| Mushroom
| Mushroom
| General
| Mushroom
| General

Color: Mushroom 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.

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 35 Points

Comfort-First Fit

A mid-rise boyshort with full coverage in the bum area.

Worry-Free Protection

An innovative floating gusset provides leak protection from every angle.

Moderate Absorbency

Absorbs about 3 super tampons worth of liquid—great for moderate flow days, light bladder leaks, and sweat.

Cozy Cotton-Blend

Soft cotton spandex feels luxurious against your skin.

Easy to Wash

Machine washable just like regular underwear.

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| Mushroom
| Mushroom
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| General
| Mushroom
| 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
FRESH FIX TECHNOLOGY®

Built-in protection that feels like nothing at all.

Absorbs about 2-3 super tampons worth of liquid.

Soft Top Layer

Soft Top Layer

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

4.2
Rated 4.2 out of 5 stars
Based on 188 reviews
Total 5 star reviews: 121 Total 4 star reviews: 25 Total 3 star reviews: 19 Total 2 star reviews: 8 Total 1 star reviews: 15
78%would recommend these products
ComfortRated 4.3 on a scale of 1 to 5
EffectivenessRated 4.3 on a scale of 1 to 5
FitRated 0.1 on a scale of minus 2 to 2
Ease of UseRated 4.5 on a scale of 1 to 5
188 reviews
  • Rated 3 out of 5 stars
    4 minutes ago
    3 Stars

    Fabric is very soft and comfortable. However, the waistband tends to roll and bunchup on me:(

    Not sure if this due to my protruding belly; perhaps a hipster version of this will alleviate the rolling and bunching.

    Lavina
  • Rated 5 out of 5 stars
    5 days ago
    Awesome underwear

    I love wearing these during my period and when I workout. They are very absorbent and wash and wear well. My husband even likes the way they look.

    Marci S.
    Verified Buyer
  • Rated 5 out of 5 stars
    6 days ago
    Comfy & Supportive

    These are 10/10! Gentle around all the edges and thin enough to wear with pants, even leggings

    Jackie
  • Rated 5 out of 5 stars
    6 days ago
    Leakproof cotton brief

    Love these

    Tracy C.
    Verified Buyer
  • Rated 4 out of 5 stars
    3 weeks ago
    Comfy

    Comfy and was way better than wearing a pad to bed.

    Katherine H.
    Verified Buyer
  • Rated 3 out of 5 stars
    3 weeks ago
    Nice cotton, weird gusset

    I love the cotton, but the gusset isn't fully connected to the actual underwear, so it's kind of strange.

    Chelsea M.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    First time buyer

    These are so comfortable! I didn’t like my old cotton briefs, but these are wonderful. Excellent control for minor bladder leaks. Will buy again!

    Donna C.
    Verified Buyer
  • Rated 1 out of 5 stars
    3 weeks ago
    Every single pair ripped

    I purchased several pairs. In every single one in this style the absorbent pad ripped away from the gusset along the front seam to the point of not being able to use within 1-3 uses following the care protocol exactly. So expensive for such poor quality. I did reach out to customer service when the first one ripped and they replaced that one after I sent specific item numbers and photos. Do not recommend!

    Megan K.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    very comfy

    very comfy, fit well, super soft. forget that your wearing them.

    Tina H.
    Verified Buyer
  • Rated 4 out of 5 stars
    1 month ago
    Nice and comfy

    the fabric is nice & soft. fit pretty well & they are comfy. you forget you have them on.

    Tina H.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Game changer!

    At 51, I wish I had discovered these sooner. I love wearing them during my workouts and during my menstruation. Very comfortable and easy to wash.

    Marci S.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Great panties for my granddaughter

    Where were these when I was younger? What a great product and that’s why I purchased them for my granddaughter. Thank you Knix.

    Cheree D.
    Verified Buyer