Your Bag

Your cart is empty

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

Suggestions

Top Picks

Revolution V-Neck Bra

$68.00 CAD
Buy a Bra, Get Free Ultrathin Undies | Code: FREELEAKPROOF

Color: White with Black Polka Dot Limited Edition

Super Leakproof® Dream Boxer

$48.00 CAD

Color: Blue Stripe Limited Edition

Leakproof UltraThin No-Show High Rise

$32.00 CAD
Mix, Match & Save: 3+ for $25 each

Color: Black with White Polka Dot Limited Edition

Uplift Push Up Bra

$78.00 CAD
Buy a Bra, Get Free Ultrathin Undies | Code: FREELEAKPROOF

Color: Cherry Limited Edition

Home / High Rise Underwear / Leakproof UltraThin No-Show High Rise
Best Seller

Leakproof UltraThin No-Show High Rise

$32.00 CAD

Mix, Match & Save: 3+ for $25 each
Checkmark

Absorbs about 2.5 super tampons

Checkmark

Invisible under clothes

Checkmark

Moderate protection without the bulk

Checkmark

Machine washable

| Black with White Polka Dot
| Black with White Polka Dot
| Black with White Polka Dot
| Black with White Polka Dot
| General
| General
| General

Absorbency: Moderate

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

Color: Black with White Polka Dot Limited Edition

Size:

True to Size

•

Size:

Size and Fit Guide

Size XS fits hips 30

Size XS

fits hips 30"-33"

Size S fits hips 34

Size S

fits hips 34"-37"

Size M fits hips 38

Size M

fits hips 38"-41"

Size XL fits hips 45

Size XL

fits hips 45"-47"

Size XXL fits hips 48

Size XXL

fits hips 48"-50"
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

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 32 Points

“Best seamless absorbent underwear"

- Women's Health

High Rise Silhouette

Sits just about the natural waist. Full coverage through the stomach, hip, and bum.

Moderate Absorbency

Absorbs 2.5 super tampons worth of liquid—perfect for moderate flow days, light bladder leaks, and sweat. The carbon cotton gusset top layer keeps you dry.

Worry-Free Protection

Perfect for moderate period days, light bladder leaks, and sweat. Moisture-wicking liner keeps you dry and comfortable.

No-Show Style

Buttery-soft and smooth fabric gives a seamless look and feel. Disappears under clothes, even leggings.

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Black with White Polka Dot
| Black with White Polka Dot
| Black with White Polka Dot
| Black with White Polka Dot
| General
| General
| 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
FRESH FIX TECHNOLOGY®

Built-in protection that feels like nothing at all.

Our patented 360 LeakSeal™ technology locks in leaks at every edge. The ultra-thin liner absorbs about 2.5 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 Underwear

Shop All Arrow Right

Super Leakproof® Dream Boxer

$48.00 CAD

Color: Blue Stripe Limited Edition

Super Leakproof® Dream Short

$48.00 CAD

Color: Black with White Polka Dot Limited Edition

Leakproof UltraThin No-Show High Rise

$32.00 CAD
Mix, Match & Save: 3+ for $25 each

Color: Black with White Polka Dot Limited Edition

Leakproof UltraThin No-Show Bikini

$27.00 CAD
Buy a Bra, Get Free Ultrathin Undies | Code: FREELEAKPROOF

Color: Black with White Polka Dot Limited Edition

SuperPlus Leakproof® No-Show High Rise

$39.00 CAD
Mix, Match & Save: 3+ for $33 each

Color: Black

Light Leakproof No-Show Bikini

$25.00 CAD
Mix, Match & Save: 3+ for $20 each

Color: Warm Sand

Super Leakproof® Dream Team Kit

From 
$80.00 CAD
$96.00
Save $16

Leakproof UltraThin No-Show French Cut

$27.00 CAD
Buy a Bra, Get Free Ultrathin Undies | Code: FREELEAKPROOF

Color: Black with White Polka Dot Limited Edition

4.5
Rated 4.5 out of 5 stars
Based on 1,172 reviews
Total 5 star reviews: 896 Total 4 star reviews: 119 Total 3 star reviews: 66 Total 2 star reviews: 27 Total 1 star reviews: 64
88%would recommend these products
ComfortRated 4.5 on a scale of 1 to 5
EffectivenessRated 4.6 on a scale of 1 to 5
FitRated 0.0 on a scale of minus 2 to 2
Ease of UseRated 4.6 on a scale of 1 to 5
Write a Review (Opens in a new window)
1,172 reviews
  • Rated 4 out of 5 stars
    4 minutes ago
    Nice product!

    First time order for me — was a bit surprised by the material, almost bathing-suit like? But still comfy, has absorbent pad. I got an XL and it fit a bit small around the waist

    Paige B.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    15 hours ago
    Not true to size

    I’ve been buying from Knix for years and I have to say their quality has gone wayyyy down. This particular set is way more tight than any of underwear I’ve purchased from them in the exact same size and cut. They might as well be a couple sizes smaller, I can’t wear them. Huge disappointment.

    Meret L.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    17 hours ago
    Perfect rise, perfect Protection

    These are great for the tail end of your cycle, tampon/disc back up or for peace of mind for light bladder leaks. I enjoy being able to put them on and "forget" about leaks or bleeding through. I will be purchasing more.

    Aleisa W.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    Yesterday
    Wrong size

    Ive bought 5 other pairs, through prime. No problems..can't even get these on over my hips!

    LeAnn I.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    Yesterday
    fine

    was unable to do an exchange on line and you do not have phone customer service department very disappointing I'm a long time customer, who will keep orders to a bar minimum

    Cheryl A.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    5 Stars

    Je les adores!

    Grandeur parfaite (true fit).

    Couvre très bien.

    Jessie
    Was this helpful?
  • Rated 5 out of 5 stars
    2 days ago
    ...

    Super comfortable!!!

    Sherrie R.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 days ago
    Surprisingly effective

    This panties fell great, wash great, protect great. Very pleased with my purchase

    Charmayne G.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 days ago
    Appropriate name of product

    Accurate description of product

    Lee C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 days ago
    Appropriate name for the product

    Description accurate

    Lee C.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    3 days ago
    Do not like

    I don’t like the cut . That’s way I ordered the boxer cut . Which I have not received

    Pam C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    The underwear’s that perform

    These underwear are phenomenal. Looking forward to getting all my purchases used so I can comment on them.

    Noelle K.
    Verified Buyer
    Was this helpful?