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Home / Boxer Underwear / Super Leakproof® Dream Boxer™
Best Seller

Super Leakproof® Dream Boxer™

$48.00 CAD

Buy 3+ Save 15%, Buy 5+ Save 20%

Absorbs about 7-9 super tampons

Built in leakproof underwear

Optimal overnight protection

Machine washable

Alexandra has 36” hips and wearing KNIX S | Eucalyptus Stripe

Alexandra has 36” hips and wearing KNIX S

| Eucalyptus Stripe
Alexandra has 36” hips and wearing KNIX S | Eucalyptus Stripe

Alexandra has 36” hips and wearing KNIX S

Alexandra has 36” hips and wearing KNIX S | Eucalyptus Stripe

Alexandra has 36” hips and wearing KNIX S

| General
| Eucalyptus Stripe
| Eucalyptus Stripe
| Eucalyptus Stripe

Alexandra has 36” hips and wearing KNIX S

Absorbency: Heavy

Color: Eucalyptus Stripe Limited Edition

Size:

Relaxed Fit

•

Size:

Size and Fit Guide

Leakproof Underwear is Sales Tax Free in Canada*

Build Your 3-Pack

Super Leakproof® Dream Boxer™

Color: Eucalyptus Stripe Limited Edition

Size:

Size:

Super Leakproof® Dream Boxer™

Color: Eucalyptus Stripe Limited Edition

Size:

Size:

Super Leakproof® Dream Boxer™

Color: Eucalyptus Stripe Limited Edition

Size:

Size:

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, Risk Free

Returns & Exchanges

New to leakproof? Your first pair is risk free for 30 days. Wear them, wash them, and see how they work for your body. Not right for you? We'll refund the item price (original shipping excluded). Prefer a different size or style? We also offer free exchanges. Just email info@knix.com and we'll take care of you.

Purchased leakproof before? Within 30 days of delivery you can exchange for another size, style, or store credit. We're unable to provide refunds on underwear. If you ordered multiple pairs, please open, wash, and wear one pair only before initiating an exchange.

Still have questions? View our full policy here.
Rewards Members Earn 48 Points

1 Dream Boxer™ is sold every 3 minutes

No wonder we've sold out 3x times

Product Description

The comfort of a boxer with the power of a pad. The Super Leakproof Dream Boxer offers a relaxed, non-restrictive fit that makes it the perfect choice for lounging and sleeping. Whether you’re managing a heavy period, postpartum recovery, or light bladder leaks, the high-rise waistband and soft-touch fabric provide a supportive feel without digging in. Designed to replace bulky pads and liners, these absorbent boxer briefs offer a sustainable, eco-friendly solution for your monthly cycle. Available in inclusive sizes XS to 4XL.

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.

Heavy 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.

Zoom

Alexandra has 36” hips and wearing KNIX S | Eucalyptus Stripe
| Eucalyptus Stripe
Alexandra has 36” hips and wearing KNIX S | Eucalyptus Stripe
Alexandra has 36” hips and wearing KNIX S | Eucalyptus Stripe
| General
| Eucalyptus Stripe
| Eucalyptus Stripe
| Eucalyptus Stripe

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
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

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

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The Heavy Flow Kit - Bikini

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Super Leakproof® Dream Team 2-Pack

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4.6
Rated 4.6 out of 5 stars
Based on 357 reviews
Total 5 star reviews: 286 Total 4 star reviews: 30 Total 3 star reviews: 17 Total 2 star reviews: 9 Total 1 star reviews: 15
Reviews Summary
Customers say these boxer shorts are exceptionally comfortable and soft, providing excellent overnight protection during periods. They appreciate the breathable fabric and secure fit that stays in place while sleeping. Many mention feeling confident about leak protection, even on heavy flow days. Users find them cute and stylish enough to wear as regular sleepwear or loungewear. Common feedback includes praise for the peace of mind they provide and their versatility beyond period use. Some note sizing runs large and recommend sizing down for proper fit. A few mention wishing for pockets or higher waistband coverage. Most customers plan to purchase additional pairs.
89%would recommend this product
ComfortRated 4.6 on a scale of 1 to 5
EffectivenessRated 4.5 on a scale of 1 to 5
FitRated 0.1 on a scale of minus 2 to 2
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357 reviews
  • Rated 5 out of 5 stars
    11 minutes ago
    Boxers

    These boxers are the best invention. I ordered one then a second pair. I took them on a long weekend trip and they worked out great.

    Christine R.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    Love!!

    So comfortable! I am going to buy at least 2 more pairs of these. The material is super soft and luxurious feeling, almost like nice hotel sheets. They do the trick and I don't worry about leakage at night. Even if you do leak on the side it cleans out in the wash on the cold cycle. I'm so happy with these sleep period shorts.

    Cailee R.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    2 days ago
    Boxers.

    Holds in more leaking very well and looks better to wear them. These were purchased for my wife and I will need to buy more of a product this effective @ leak retention

    Usage ( if you had an option ) is:

    Heavy bladder leaks

    Jeff A.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Totally worth it!

    Not just for periods! I am now menopausal and experience occasional bladder leakage. I opted for these boxers because they have a panty with the absorption protection I need built right into a sleep short. They fit great, are cute, and most importantly, I can actually go to sleep without anxiety or worry.

    Kristen M.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    I have two pairs

    Saw this on a you tube video and they were so cute I had to have a pair. I got them and now have two pair.

    Tom a. E. H.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Boxers!

    Love these boxers, so comfy for sleep and the added leak protection is wonderful. Must have more!! Ordered a large wanting a loose fit, will probably order a medium next time .

    Keiko F.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    5 Stars

    So comfortable

    Emily
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    5 Stars

    Fantasic!! Super comfy, super cute, fit perfect, true to size! I bought all the colours

    Lisa
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Dream Boxer

    This boxer is a must have for summer sleepware!

    Betty T.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Super Comfy

    Love these as a sleep alternative to pads. Really comfortable and breathable!

    Jennifer F.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Good for overnight

    Good for overnight

    Caroline S.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    New favorite

    Love these for my new pj bottoms. They looked a little big so I was able to exchange with no issue, so comfortable .

    Heather M.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?

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