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Color: Black
Best Seller

Color: Black

Size:

Size:

Size and Fit Guide

Mix & Match: 3+ for $20 each
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Teen Super Leakproof® Sleepover Boxer

$45.00 CAD

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Absorbs about 7-9 super tampons

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Built in leakproof underwear

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Optimal overnight protection

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Machine washable

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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.

Easy Returns 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 45 Points

You May Also Like

Comfort-First Fit

Combining a loose-fitting boxer with an internal brief for discreet Leakproof protection. Designed to be worn as both loungewear and overnight protection.

Worry-Free Protection

Designed with a built-in leakproof liner that fits snug to the body, it helps lock in leaks from every angle, even as you toss and turn.

Ultra Absorbency

Absorbs 7-9 super tampons' worth of liquid for overnight protection, heavy flow days, and light bladder leaks.

Machine Washable

Machine washable, just like regular underwear.

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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
    6-11 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 3-6 super tampons
  • cup
    about 1-2 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • light period days
  • sweat
  • sweat and 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 3-6 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-3 super tampons
  • cup
    about 0.5-1 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • extra heavy period days
  • overnight protection
  • light bladder leaks
  • tsp
    13-17 tsp
  • pad
    3.5-4.5 regular pads
  • tampon
    7-9 super tampons
  • cup
    2-3 menstrual cups
FRESH FIX TECHNOLOGY®

Built-in protection that feels like nothing at all.

So you feel fresh and in-control. Absorbs ~ 7-9 Super tampons.

Soft Top Layer

Soft Top Layer

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

4.0
Rated 4.0 out of 5 stars
Based on 4 reviews
Total 5 star reviews: 2 Total 4 star reviews: 0 Total 3 star reviews: 2 Total 2 star reviews: 0 Total 1 star reviews: 0
50%would recommend this product
FitRated 0.0 on a scale of minus 2 to 2
4 reviews
  • Rated 5 out of 5 stars
    1 week ago
    THE BEST.

    I was a little hesitant at first as I tend to have nights where I move around a lot and was worried about still leaking. Wore these and now I want one of every pair. They’re super comfy to the point where I almost forgot I was on my period. Worth every cent, go grab yourself a pair.

    kayla a.
    Verified Buyer
  • Rated 3 out of 5 stars
    2 weeks ago
    Fit small

    Needs to be made to accommodate actual women’s size. Daughter is a small- med and medium were too tight in butt

    Christina F.
    Verified Buyer
  • Rated 3 out of 5 stars
    2 weeks ago
    Fit small

    Great idea but while the underwear part fits the shorts are too tight in the butt

    Christina F.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    The cutest boxers!

    Not only are these so cute and comfortable, but it absorbs a lot and is 100% leakproof which I love!! My new go to.

    Tiffany M.
    Verified Buyer