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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
KnixTeen

Teen Light Leakproof No-Show Boyshort Kit

$22.00 CAD

Bundle & Save: 3 for $60
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Absorbs about 1 regular tampon

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Invisible under clothes

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Ideal for everyday wear

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Machine washable

Rose (she/her) has 35

Rose (she/her) has 35" hips and is wearing a size M

| Black
Rose (she/her) has 35

Rose (she/her) has 35" hips and is wearing a size M

Eleena (she/her) has 45

Eleena (she/her) has 45" hips and is wearing a size XL

Eleena (she/her) has 45

Eleena (she/her) has 45" hips and is wearing a size XL

Rose (she/her) has 35" hips and is wearing a size M

Color: Black

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 22 Points

Comfort-First Fit

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

Light Absorbency

Absorbs 1 regular tampon worth of liquid—perfect for moderate period days, light bladder leaks, and sweat. The carbon cotton gusset top layer wicks away moisture from your skin.

No-Show Style

Made from our signature buttery-soft PerformaStretch® fabric, it appears invisible under clothing.

Easy to Wash

Machine washable just like regular underwear.

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Rose (she/her) has 35
| Black
Rose (she/her) has 35
Eleena (she/her) has 45
Eleena (she/her) has 45

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 1-3 regular tampons worth of liquid.

Soft Top Layer

Soft Top Layer

The carbon cotton gusset layer gently wicks away moisture from your skin, keeping you feeling fresh and odor-free.

4.6
Rated 4.6 out of 5 stars
Based on 5,517 reviews
Total 5 star reviews: 4.3k Total 4 star reviews: 737 Total 3 star reviews: 255 Total 2 star reviews: 124 Total 1 star reviews: 132
93%would recommend these products
5,517 reviews
  • Rated 5 out of 5 stars
    Yesterday
    Love these!

    I finally decided to give knix undies a try and I love these. I am currently pregnant, so I got the light absorbency just to avoid having to wear a panty liner every single day (yay pregnancy!) and I am very happy. I felt so much more comfortable, any leaks or discharge I didn't notice, they didn't feel wet. They also stay in place nicely, no riding up, and no panty lines! Win win. I'll definitely purchase more in the future. I purchased size M after checking out their size chart in store, they felt a bit snug when I first put them on but after wearing them for a bit I was super comfortable, they stretched the perfect amount.

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

    Very comfy

    Lindsey
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    LOVE

    fits so great, so comfy and sleek.

    perfect to wear with leggings, they don't show at all!

    A must !

    i would say though the lining is not really "large". so if you got a larger area to cover, it might not fit well...

    Sarah B.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Always a fan

    Have been using these undies for years. Highly recommend. Wear them every day.

    Great for as period back up, or wear them on their own for lighter days.

    Emilie P.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    These are awesome

    Very comfortable!!

    Roxanne K.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Very comfortable

    So comfortable and now I have the peace of mind for spotty days where I don’t wanna wear a pad or tampon

    Faith G.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Love this party!

    This is my favorite underwear! I’ve purchased it a few times now ! Love love love

    Susan C.
    Verified Buyer
  • Rated 5 out of 5 stars
    4 weeks ago
    Best undies

    I have heaps of these now, so very comfortable and fast drying. Love the fit and feel.

    Catherine M.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    The best underwear for middle aged life!

    Comfy, smooth, practical, and pretty! Love the light leakproof feature for peace of mind for anything mid-life throws my way!

    Rebecca L.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Really like these underware

    These are all so comfortable to wear.

    Stella A.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Super comfortable

    Love these. Great cut and super comfortable. Used as a back up during my period and it worked great

    Adrienne J.
    Verified Buyer
  • Rated 2 out of 5 stars
    1 month ago
    Sizing problems

    Ì ordered these based on my measurements, as well as my experience with other undergarments purchased from Knix. My size is barely in an XL, but a shaper garment I bought had to be XXL. In order to save a little money I ordered a discontinued colour, which was on sale. I ordered XL, and they are too large. But I can’t return them because they were final sale.

    If anyone is interested, they don’t shrink when they are washed in hot water and tossed in the dryer.

    Mary P.
    Verified Buyer