Your Bag

Your cart is empty

But you're full of potential..
Rewards Members Earn 0 Points

Suggestions

Top Picks

WingWoman Contour Bra

$60.00 CAD
$75.00
2 for $90

Color: Black

Revolution V-Neck Bra

$54.40 CAD
$68.00
20-60% off

Color: Warm Sand

The Quintessential Sleep Set

$75.00 CAD
$150.00
20-60% off

Color: White

Super Leakproof® Dream Boxer

$48.00 CAD
*Excluded from Sale

Color: Dark Cherry Stripe Limited Edition

Home / / LeakStrong™ Leakproof Short
Sale

LeakStrong™ Leakproof Short

$36.00 CAD

$90.00

60% off
Checkmark

High-rise fit

Checkmark

Medium impact

Checkmark

Absorbs about 2.5 super tampons

Cassaerea has 42

Cassaerea has 42" hips and wears a Knix size L

| Titanium
Cassaerea has 42

Cassaerea has 42" hips and wears a Knix size L

Cassaerea has 42

Cassaerea has 42" hips and wears a Knix size L

Cassaerea has 42

Cassaerea has 42" hips and wears a Knix size L

Cassaerea has 42" hips and wears a Knix size L

Absorbency: Moderate
Drop
Drop
Drop
Drop
Drop

Color: Titanium Limited Edition

Size:

True to Size

•

Size:

Size and Fit Guide

Get FREE Express Shipping on all orders $125+

Shipping

HOLIDAY SHIPPING

Give the gift of Knix! To receive your order by Dec 24th, please order by the following dates.

Toronto, Ottawa, Montreal, Winnipeg, Regina, Calgary, Edmonton, Vancouver
Standard & Expedited: Monday, December 22

Urban Centres (excluding the above)
Standard: Wednesday, December 17
Express: Sunday, December 21

Rest of Canada
Standard: Sun, December 14*
Express: Thu, December 18*
*YK, NWT, NT, NL, and remote areas across Canada.

For locations serviced solely by Canada Post, please allow at least 5 additional days due to rotating strikes. This applies to P.O Box and RR addresses.

To avoid any additional delays during the rotating strikes, we will use alternate carriers when possible.

Please note: Weather conditions and carrier issues may cause delays. Delivery dates are not guaranteed.

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.
Year End Sale Return Policy

Returns

Returns

Sale & Last Call

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

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.
Rewards Members Earn 36 Points

Functional Style

High-rise shorts with an 8" inseam and an extra-wide, no-slip supportive waistband that defines your natural shape. It also features side pockets for sneaky storage.

Moderate Absorbency

Our FitKnix™ technology and quick-dry fabric with a built-in leakproof liner absorb about 2.5 super tampons worth of liquid.

Zoom

Cassaerea has 42
| Titanium
Cassaerea has 42
Cassaerea has 42
Cassaerea has 42

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
FRESH FIX TECHNOLOGY®

Built-in protection that feels like nothing at all.

Leakproof liner 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.

Our Best-Selling Activewear

Shop All Arrow Right

Catalyst Sports Bra

$68.00 CAD
$85.00
20-50% off

Color: White

Momenta Racerback Sports Bra

$34.00 CAD
$68.00
20-50% off

Color: Burnished Gold Limited Edition

HiTouch™️ High Rise Legging

$36.00 CAD
$90.00
20-60% off

Color: Burnished Gold Limited Edition

Studio Sport Dress

$44.00 CAD
$110.00
60% off

Color: Black

Pursuit Leakproof Training Short

$52.50 CAD
$75.00
30-60% off

Color: Twilight Navy Limited Edition

Studio V-Neck Tank

$27.20 CAD
$68.00
60% off

Color: Olive Limited Edition

Studio V-Neck Dress

$44.00 CAD
$110.00
60% off

Color: Black

HiTouch™️ Capri Legging

$54.60 CAD
$78.00
30-60% off

Color: Black

4.1
Rated 4.1 out of 5 stars
Based on 177 reviews
Total 5 star reviews: 108 Total 4 star reviews: 23 Total 3 star reviews: 18 Total 2 star reviews: 14 Total 1 star reviews: 14
77%would recommend these products
Write a Review (Opens in a new window)
177 reviews
  • Rated 5 out of 5 stars
    1 week ago
    excellent for exercising in

    love these shorts. nice and tight but still allows movement.

    PATRICIA B.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    3 months ago
    Sweaty Mess

    There is a lot to like about these shorts, but they show sweat stains everywhere other than the liner area, which then also looks kind of strange as a result. Will have to stick to the darkest colours. Sizing is a bit off if you have a smaller waist and strong thighs, but don’t have issues with them rolling up or down.

    Suzy
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    4 months ago
    Don't stay put

    When I tried them on in the store they seemed to fit well but trying to play sports in them they don't stay put. Constantly fidgeting/adjusting them.

    Caroline C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 months ago
    5 Stars

    Good quality. Haven't usded it yet, so I can not speak about the absorvancy, but it looks pretty well made, and I am happy with this purchase. My daughter is using it for sports and she liked how they felt when she trued them on. Price is high, though, even though I got them on sale, but I think it is worth it. .

    Idana
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    6 months ago
    Very comfy but a little big on the waist

    I love these, there very breathable and comfy and the color is very pretty. I bought the XL that fits perfectly around my hips and legs with no circulation cutoff but the waist is a tad too loose. It would be awesome if the waist was tighter as I am always pulling them up. For reference I am 47 inch at the hips and 38 inch at the waist which are basically the measurements for an XL so maybe they run a tad too big but the hips and below fit perfectly so I am torn.

    Kraken
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    7 months ago
    Too tight and thick

    Very tight and thick

    Irina G.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    7 months ago
    Knix LeakproofUnderwear

    Top notch, just ordered 3 more.

    Donna S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    7 months ago
    Pickleball perfect

    I play much better when I am comfortable in these shorts.

    Diana P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    8 months ago
    Shorts

    Love these

    Linda S.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    9 months ago
    2 Stars

    Waist band will not stay smooth. Keep folding over

    Gursharn
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    9 months ago
    Product 3*, customer service 10+*

    I was disappointed. There's is very little stretch in the waist line....I couldn't get them on over my hips.

    Customer service went above and beyond, to make sure I was happy.

    JUDITH V.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    10 months ago
    1 Star

    The medium would fit a child

    Louise
    Verified Buyer
    Was this helpful?