Your Bag

Your cart is empty

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

Suggestions

Top Picks

Ultra Leakproof Zones+® Bikini

$19.00 CAD
$36.00
45% off

Color: Warm Sand

Super Leakproof® Dream Short

$33.60 CAD
$48.00
2 for $65

Color: Tapestry Limited Edition

Revolution V-Neck Bra

$47.60 CAD
$68.00
30-70% off

Color: Rose Water

FreeFlex™ Demi Bra

$54.60 CAD
$78.00
2 for $80

Color: Dark Cherry Limited Edition

Home / Cyber Monday Up to 60% off / SuperPlus Leakproof® No-Show High Rise
Sale

SuperPlus Leakproof® No-Show High Rise

$31.20 CAD

$39.00

20% off
Checkmark

Absorbs 7-11 super tampons

Checkmark

Front-to-back liner

Checkmark

Bonded seams prevent leaks

Checkmark

Machine washable

Ashley has 39” hips and wears KNIX S | Black

Ashley has 39” hips and wears KNIX S

| Black
Ashley has 39” hips and wears KNIX S | Black

Ashley has 39” hips and wears KNIX S

Ashley has 39” hips and wears KNIX S | Black

Ashley has 39” hips and wears KNIX S

| General

Ashley has 39” hips and wears KNIX S

Absorbency: Ultra

Ultra
Drop
Drop
Drop
Drop
Drop
about 7-11 super tampons
Essential
Drop
Drop
Drop
Drop
Drop
No Absorbency
Moderate
Drop
Drop
Drop
Drop
Drop
about 2-4 super tampons
Light
Drop
Drop
Drop
Drop
Drop
about 1-3 regular tampons
Heavy
Drop
Drop
Drop
Drop
Drop
about 4-7 super tampons

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.
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 31 Points

You May Also Like

Ultra Leakproof Zones+® High Rise

$19.00 CAD
$39.00

Leakproof UltraThin No-Show High Rise

$25.60 CAD
$32.00

Super Leakproof® Dream Boxer

$48.00 CAD

Comfort-First Fit

High-rise silhouette sits at your natural waist and offers medium coverage for the bum, combining comfort with a flattering fit.

Ultimate Leakproof Protection

Our longest, most absorbent liner ever—front-to-back coverage without the bulk.

Day & Night Comfort

Buttery-soft stretch fabric moves with you, while bonded seams keep leaks contained and create a smooth, seamless look under clothing.

Machine Washable

Wash just like your regular underwear—easy, everyday care.

Zoom

Ashley has 39” hips and wears KNIX S | Black
| Black
Ashley has 39” hips and wears KNIX S | Black
Ashley has 39” hips and wears KNIX S | Black
| 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

Our longest, most absorbent liner—ever.

Our original Fresh Fix Technology® features a built-in absorbent liner that soaks up about 7–11 super tampons’ worth of liquid—so you stay fresh, comfortable, and in control.

Soft Top Layer

Soft Top Layer

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

Cyber Monday Deals

Shop All Arrow Right

Super Leakproof® Dream Short

$33.60 CAD
$48.00
2 for $65

Color: Dark Cherry Limited Edition

Leakproof UltraThin No-Show High Rise

$25.60 CAD
$32.00
20-30% off

Color: Warm Sand

Leakproof UltraThin No-Show French Cut

$21.60 CAD
$27.00
20-30% off

Color: Black

Light Leakproof UltraThin No-Show Thong

$18.90 CAD
$27.00
30% off

Color: Rose Water

Ultra Leakproof Zones+® Bikini

$19.00 CAD
$36.00
45% off

Color: Warm Sand

The Full Cycle Kit - Bikini

From 
$111.30 CAD
$159.00
Save $53

Leakproof Cotton Boybrief

$24.50 CAD
$35.00
3 for $44.99

Color: Rose Water

Super Leakproof® No-Show High Rise

$25.20 CAD
$36.00
30% off

Color: Twilight Navy Limited Edition

4.5
Rated 4.5 out of 5 stars
Based on 35 reviews
Total 5 star reviews: 29 Total 4 star reviews: 0 Total 3 star reviews: 3 Total 2 star reviews: 1 Total 1 star reviews: 2
83%would recommend this product
ComfortRated 4.2 on a scale of 1 to 5
EffectivenessRated 4.4 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
Write a Review (Opens in a new window)
35 reviews
  • Rated 5 out of 5 stars
    4 minutes ago
    Works just as described

    The best. Helps me in a big way. I have my confidence back. I can go out again and know Knix has me covered. Thank you for this design and support.

    Betsy R.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 hours ago
    5 Stars

    I liked these quite a lot. They do what they advertise. They are more bathing suit feeling than expected, but honestly, I'm really happy with this. I bought this in contrast to the boy short style I purchased. These are definitely superior for nights. The others are great for day time. If I find myself being anxious or unsure about what the day or evening will bring, reaching for any of my knix underwear makes me feel safer and more confident.

    Lunar
    Was this helpful?
  • Rated 5 out of 5 stars
    19 hours ago
    Leakproof high rise knickers!

    Very comfortable and smooth under pants.

    Will buy more!

    Lynne N.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    Yesterday
    I Was Hopeful

    Firstly, I was so excited to receive these since it looked like it was going to help me on my heavy days. However, there was some leakage from the sides on my first day, which stained my pants. Very unfortunate. On the other days, they worked well.

    Secondly, I’m usually a medium in pants and undies, and that’s what I ordered, but these are a bit too tight. If I order next time, I would order a large.

    Rubina M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 days ago
    Super plus

    They are great

    I love the high rise

    They’re very comfortable

    Jane P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 days ago
    Great absorption

    New design is improved absorption. Colors are fabulous. Size runs small.

    Ann L.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    Game Changer!

    I would wake up multiple times a night just to change my pad with these I can sleep through the night with no leaks!

    Amanda
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    Love them

    I love these

    Patty M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    5 Stars

    They are comfy and do their job well! Love them!

    Faith
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    Je les adore

    Confos et super absorbantes. C'est le paradis!

    Colombe D.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    6 days ago
    Good, but not great

    My problem is more pelvic floor weakness, than little leaks -- especially when I first get up in the morning. These undies do a decent job of controlling the floodwaters, but the urine does seep through the leg elastic onto my pj's. Also, initially the leg openings stayed in place, but after a wash or two it seems like the elastic has weakened and I wind up with the back of the panties riding up uncomfortably.

    Ann H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    Leakproof

    The best underwear. Takes away leak worries away.

    Colleen S.
    Verified Buyer
    Was this helpful?

Save on Underwear Kits

Shop Now Arrow Right

Ultra Leakproof Zones+® High Rise 3-Pack

From 
$57.00 CAD
$117.00
Save $60

Ultra Leakproof Zones+® Bikini 3-Pack

From 
$57.00 CAD
$108.00
Save $51

Super Leakproof® Dream Short 2-Pack

From 
$65.00 CAD
$96.00
Save $31

Leakproof Cotton High Rise 3-Pack

From 
$44.99 CAD
$87.00
Save $42

Super Leakproof® Dream Team Kit

From 
$81.60 CAD
$96.00
Save $14

Leakproof Thigh Saver® 2-Pack

From 
$40.00 CAD
$88.00
Save $48

Leakproof Cotton Mystery 3-Pack

From 
$36.00 CAD
$87.00
Save $51

Leakproof Cotton Bikini 3-Pack

From 
$44.99 CAD
$75.00
Save $30