Your Bag

Your cart is empty

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

Suggestions

Top Picks

The Quintessential Sleep Set

$150.00 CAD

Color: Dark Cherry Limited Edition

Super Leakproof® Dream Short

$48.00 CAD

Color: Tapestry Limited Edition

Shimmer Stretch Bralette

$58.00 CAD
10% off Bra & Underwear Sets*

Color: Black

SuperPlus Leakproof® No-Show Bikini

$36.00 CAD
Mix & Match: 3+ for $33 each

Color: Dark Cherry Limited Edition

Home / Boxer Underwear / Leakproof Logo Modal Rib Boxer Brief

Leakproof Logo Modal Rib Boxer Brief

Ribbed modal boxer brief with light leakproof.
$35.00 CAD

Esther has 38

Esther has 38" hips and wears a Knix size M

| White
Esther has 38

Esther has 38" hips and wears a Knix size M

Esther has 38

Esther has 38" hips and wears a Knix size M

| General
| General
| General

Esther has 38" hips and wears a Knix size M

Absorbency: Light
Drop
Drop
Drop
Drop
Drop

Color: White

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

You May Also Like

Leakproof Logo Modal Rib French Cut

$25.00 CAD

Super Leakproof® Dream Short

$48.00 CAD

Logo Modal Rib Bralette

$50.00 CAD

Comfort-First Fit

This boxer style sits at the natural waistline with full bum coverage.

Worry-Free Protection

Our original leakproof technology offers a barely there feel while patented bonded edges help prevent side leaks.

Light Absorbency

Absorbs 1 regular tampon worth of liquid—perfect for light flow days, sweat and discharge, and backup protection for heavy flow days.

Easy to Wash

Machine washable just like regular underwear.

Zoom

Esther has 38
| White
Esther has 38
Esther has 38
| 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
PATENTED LEAKPROOF TECHNOLOGY

Built-in protection that feels like nothing at all

Our original Fresh Fix Technology® features a built-in absorbent liner absorbing about 1 regular tampon worth of liquid so you feel fresh and in-control.

Soft Top Layer

Soft Top Layer

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

Holiday Top Picks

Shop All Arrow Right

Leakproof UltraThin No-Show Bikini Shimmer 3-Pack

$75.00 CAD

Color: Tapestry/Burnished Gold/Dark Cherry Limited Edition

WingWoman Contour Bra

$75.00 CAD
10% off Bra & Underwear Sets*

Color: Tapestry Limited Edition

The Quintessential Sleep Set

$150.00 CAD

Color: Ivory Limited Edition

Light Leakproof UltraThin No-Show Thong

$27.00 CAD
Mix & Match: 3+ for $20 each

Color: Warm Sand

Shimmer Stretch Bralette

$58.00 CAD
10% off Bra & Underwear Sets*

Color: Black

Overnight Favorites Gift Set

From 
$83.00 CAD

SculptRib™ Cotton Long Sleeve Top

$62.00 CAD

Color: Dark Cherry Limited Edition

Modal Rib Henley Sleep Set

$75.00 CAD

Color: Black

4.2
Rated 4.2 out of 5 stars
Based on 124 reviews
Total 5 star reviews: 79 Total 4 star reviews: 18 Total 3 star reviews: 8 Total 2 star reviews: 5 Total 1 star reviews: 14
77%would recommend this product
ComfortRated 4.1 on a scale of 1 to 5
EffectivenessRated 4.2 on a scale of 1 to 5
FitRated 0.1 on a scale of minus 2 to 2
Ease of UseRated 4.3 on a scale of 1 to 5
Write a Review (Opens in a new window)
124 reviews
  • Rated 1 out of 5 stars
    1 hour ago
    Unwearable

    These are so itchy and uncomfortable that I can't even wear them.

    P
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 hour ago
    5 Stars

    These are my go to for sleeping during my period. They are comfy and knowing they have leak proof protection lets me sleep without worrying about leaking.

    Emma
    Was this helpful?
  • Rated 1 out of 5 stars
    4 days ago
    1 Star

    Fabric is very very thin, waistband is not very stretchy. All in all, uncomfortable and unflattering.

    Lauren
    Was this helpful?
  • Rated 3 out of 5 stars
    1 month ago
    Tight waistband

    I really wanted to love these because the fabric and cut is great but the waistband is quite tight and digs in. Even after sizing up, they are still uncomfortable around my waist despite fitting great everywhere else!

    Kaylee
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    1 month ago
    Great for sleeping in!

    I really love that the protection goes all the way up the back, so great for sleeping! But I do find the waist elastic too tight. I normally wear an xxl during my period but I think I should’ve sized up. They fit they’re just too tight on that day two bloat. Rolled them down and that helped

    Kara
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    1 month ago
    Not for me

    Maybe these are sized differently from the styles I have bought before, but they were baggy and the rise was higher than I would have liked, and I found them generally uncomfortable. I have returned them and will purchase more of the ones I have been wearing.

    Honor, N.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Try something new

    It was interesting to try this new boy style. It is very comfortable and I like the elastic waistband.

    Sally S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 months ago
    Something Different

    Really different and so totally awesome. Fits comfortably, not as stretchy as the dream short but depending on what you're wearing, it has is purpose.

    Marjorie R.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 months ago
    Comfy

    Very comfy, and easy to care for. Only complaint is that the waist fits small, and I had to size up.

    Jordan O.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 months ago
    5 Stars

    Love it

    Evelyn
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    2 months ago
    4 Stars

    Not bad at all.

    Evelyn
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    2 months ago
    Good!

    So comfy ! it's to high rise for me but if I roll down the band once, it hits at the right place.

    I would recommend to size down.

    But the cotton lining is sooo soft and comfy! No itching or irritation.

    Sarah B.
    Verified Buyer
    Was this helpful?