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Color: Black
Best Seller

Color: Black

Size:

Size:

Size and Fit Guide

Mix & Match: 3+ for $20 each
Rewards Members Earn 0 Points
Selling Fast

Super Leakproof® Dream Boxer

$48.00 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: Plaid Limited Edition

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 48 Points

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—great for heavy flow days, overnight protection, and light bladder leaks.

Easy to Wash

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.

Our patented 360 LeakSeal™ technology helps lock in leaks from every angle, even if you toss and turn. The internal brief absorbs about 7-9 super tampons worth of liquid, and it’s our heaviest absorbency yet.

Soft Top Layer

Soft Top Layer

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

4.4
Rated 4.4 out of 5 stars
Based on 53 reviews
Total 5 star reviews: 39 Total 4 star reviews: 5 Total 3 star reviews: 4 Total 2 star reviews: 2 Total 1 star reviews: 3
83%would recommend this product
53 reviews
  • Rated 1 out of 5 stars
    9 hours ago
    Horrible customer service

    I need to talk on phone about an order issue. No one will call me back. I have tried by email and chat for 2 days.

    Cathe H.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    Cute and functional.

    Mandi
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    So cute and functional.

    Mandi
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    So cute and functional. Great for Dorm wear.

    Mandi
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    My girls love them!!!

    Mandi
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    Comfy and cute! Perfect for sleeping in

    Sheri
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Love!

    Fantastic!

    nicole S.
    Verified Buyer
  • Rated 1 out of 5 stars
    2 weeks ago
    Dream Boxer

    Comfortable but not effective for bladder leaks

    Jean R.
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    My daughter put these on immediately when they arrived. She loves them!

    Rhonda
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    These were a gift for my daighter and she loves wearing them. She says they are comfortable and give her confidence when she wears them to bed or "out and about" under her slacks.

    Rhonda
  • Rated 5 out of 5 stars
    2 weeks ago
    Awesome for gender non-conforming folks

    Very comfy, perfect for masc-presenting folks who bleed. Thank you for creating these versatile boxers.

    Mel
    Verified Buyer
  • Rated 5 out of 5 stars
    2 weeks ago
    Perfect

    Comfy, they fit well, and they do the job.

    Monique D.
    Verified Buyer