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Luxe Modal Leakproof Sleep Boxer

$44.00 CAD

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Absorbs about 3 regular tampons

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Soft modal fabric blend

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Machine washable

| Black
| Black
| Black
| Black
 | General

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.

First Pair Risk Free for 30 Days

Leakproof Underwear

Returns & Exchanges

First Pair Risk Free for 30 Days
Because they're, well, underwear, we can't accept returns or exchanges on used items — but you can try your first pair of leakproof  on your first order risk-free for 30 days.

Ordered the wrong size? If the fit isn't right, we'll send you a replacement size at no cost or issue a refund within 30 days of delivery (excluding original shipping fees).

Ordered multiple pairs? Open, wash, and wear just one pair before deciding. If it's not for you, any remaining unopened pairs from the same order are eligible for an exchange or refund within 30 days of delivery (excluding original shipping fees).

Refunds apply to the item price only and exclude original shipping fees.

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 44 Points

"They're made with a cloud-soft modal fabric blend and shadow-sheer waistband detailing that allow for a restful, worry-free night of sleep."

- Woman's World

Comfort-First Fit

Boxer short style with a high-rise fit and extra hip and bum coverage.

Light Absorbency

Absorbs 3 regular tampons worth of liquid—perfect for light flow days, sweat, discharge, or backup for heavy flow days.

Breezy Modal

The lightweight, naturally breathable modal fabric feels soft against the skin as you sleep with a non-digging shadow sheer waistband.

Easy to Wash

Machine washable just like regular underwear.

Zoom

| Black
| Black
| Black
| Black
 | General

How to Choose?

Essential

  • Days you don’t need leak protection. Everyday freshness and moisture wicking.
  • tsp
    0 tsp

Heavy

  • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
  • 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

  • Daily freshness. For sweat, discharge, period spotting, or backup protection.
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

  • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
  • 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

  • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
  • 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.

4.3
Rated 4.3 out of 5 stars
Based on 137 reviews
Total 5 star reviews: 92 Total 4 star reviews: 16 Total 3 star reviews: 10 Total 2 star reviews: 12 Total 1 star reviews: 7
82%would recommend these products
ComfortRated 4.1 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 4.3 on a scale of 1 to 5
137 reviews
  • Rated 5 out of 5 stars
    1 month ago
    Super comfortable at night

    Not only do these give me confidence that I’m not going to leak onto my bed at night, they also keep my inner thighs from sticking together.

    Peggy L.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 months ago
    Perfect!

    Love the silky smooth feel and all day comfort.

    Karen B.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 months ago
    Sleep boxer

    Love these fit great

    Cheryl S.
    Verified Buyer
  • Rated 5 out of 5 stars
    5 months ago
    Favourites!

    I love these (please restock mediums!). I have other knix underwear and I like them but I find that the elastics dig in around the waist and thighs even when sizing up. These are sooooo comfortable and soft. I am typically a size small in pants but often go for a medium for underwear and bikini bottoms because they fit more comfortably. The medium is definitely a bit loose on me around the waist but I like them that way. These are the only thing I want to wear when I'm on my period and uncomfortable.

    Casidy
  • Rated 5 out of 5 stars
    5 months ago
    Comfy and a worry free night!

    Just as the title says!

    Have asthma that makes me cough at night, I’ve borne three children and I’m over 65. ‘Nuff said!

    Janice L. B.
    Verified Buyer
  • Rated 5 out of 5 stars
    5 months ago
    5 Stars

    Wonderful

    Eva
    Verified Buyer
  • Rated 5 out of 5 stars
    5 months ago
    Leakproof sleep boxer

    Would buy it again

    Edweene C.
    Verified Buyer
  • Rated 5 out of 5 stars
    6 months ago
    Love my Knix

    They are soft and comfortable and work like the are suppose to . Iam looking foward to trying the new cotton ones.

    irene k.
    Verified Buyer
  • Rated 5 out of 5 stars
    6 months ago
    Very comfy

    Comfy and I love the feel of the fabric

    Christine C.
    Verified Buyer
  • Rated 5 out of 5 stars
    6 months ago
    Comfyish

    Really nice idea, but don't fit like the other dream shorts, legs are too tight for me

    Marjorie R.
    Verified Buyer
  • Rated 5 out of 5 stars
    6 months ago
    5 Stars

    Great product never an unpleasant surprise. Great return policy. Love Knix

    Katherine
    Verified Buyer
  • Rated 5 out of 5 stars
    7 months ago
    Love these!

    I have a few different types of Knix and this is my favorite. Great length under everything! My only complaint is please give us more colors like more nude colors to wear under white pants. I know they are called "sleep" but I wear them all day long.

    Linda
    Verified Buyer