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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 7-8 super tampons

Built in leakproof underwear

Optimal overnight protection

Machine washable

Absorbency: Heavy

Color: Periwinkle 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: Periwinkle Limited Edition

Size:

Size:

Super Leakproof® Dream Boxer™

Color: Periwinkle Limited Edition

Size:

Size:

Super Leakproof® Dream Boxer™

Color: Periwinkle 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 5x 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 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 up to 8 super tampons. Great for heavy flow days, overnight protection, and light bladder leaks.

Easy to Wash

Machine washable, just like your regular underwear.

Zoom

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

How it Compares

Super Leakproof® Dream Boxer™

Absorbs up to 8 super tampons

Absorbs up to 8 super tampons

Classic length

Classic length

Side slit hem

Side slit hem

Super Leakproof® Mini Dream Boxer

Absorbs up to 8 super tampons

Absorbs up to 8 super tampons

Mini length

Mini length

Lace detailing

Lace detailing

NEW SuperPlus Leakproof® Dream Short

Absorbs up to 11 super tampons

Absorbs up to 11 super tampons

Front-to-back liner 

Front-to-back liner 

No-show, seamless fit

No-show, seamless fit

Super Leakproof® Dream Short™

Absorbs up to 5.5 super tampons

Absorbs up to 5.5 super tampons

Body-hugging fit

Body-hugging fit

No-show, seamless fit

No-show, seamless fit

Super Leakproof® Cotton Boxer Brief

Absorbs up to 6 super tampons

Absorbs up to 6 super tampons

Body-hugging fit

Body-hugging fit

Breathable cotton

Breathable cotton

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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Super Leakproof® Dream Short™ 2-Pack

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4.6
Rated 4.6 out of 5 stars
Based on 422 reviews
Total 5 star reviews: 335 Total 4 star reviews: 36 Total 3 star reviews: 21 Total 2 star reviews: 14 Total 1 star reviews: 16
Reviews Summary
Customers say these boxers are exceptionally comfortable and perfect for sleeping, with a soft, breathable fabric that feels luxurious. Many praise the cute designs and stylish appearance, making them wearable as regular sleep shorts. Customers frequently mention reliable overnight protection without bulk or restrictive feel. Common feedback addresses sizing inconsistency—some find they run large and recommend sizing down, while others report true-to-size fits. A few note concerns about absorption coverage or fit in specific areas. Overall, customers appreciate the combination of comfort and functionality for nighttime wear.
88%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 0.2 on a scale of minus 2 to 2
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422 reviews
  • Rated 5 out of 5 stars
    8 hours ago
    amazing

    I love these so much. They are perfectly comfortable and cool. And super cute

    Kim O.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    So Awesome!!!

    These are not my first pair of period underwear. I bought a few pairs from another company. I stopped wearing them after a few time because they wear too tight and uncomfortable. The sizes they displayed were incorrect. They were uncomfortable to take off because you had to worry about making a mess, also same issue with using the restroom. Had to worry when sleeping because they were uncomfortable and didnt want to leak on everything. I have worn 2 pairs of the knix leakproof dream boxers. One pair last night and one pair today working around the house. I have to say these are the best. They are so comfortable. They don't feel heavy. The clean up after using the restroom is a breeze. I slept all night and didn't have an issue. I sold with these.

    Birginia B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    Super Leakproof® Dream Boxer™

    Love it!

    Lucy T.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 days ago
    Daughter loves them

    Feel great. She has 1 size M & 1 size L. These run a little on the small side as others have noted. M fits better, but she kept the L also for times when she wants a looser fit (& flow not too heavy)

    Nancy L.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    5 days ago
    Best ever

    Super comfy and absorbent!

    Emily R.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    So comfy!

    They fit so nice and are very comfortable! I forget that I am wearing period underwear lol.

    Haylee C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    Dream boxers

    The shorts are so soft and comfortable!

    Hallie F.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Dream

    Excellent product

    Lianna E.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    So comfortable!

    So happy with my dream boxers. They're so comfortable and make period sleeping so much better!

    Madison R.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Second pair

    I adore these. Great for summer, great protection!

    Phyllis B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    Very comfortable and cute, happy with these

    adi
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    The dream boxer is the “IT” Wear!

    Love this item! I’ve purchased three so far; and waiting for some more hopefully to land in different patterns. Great to wear overnight with a T-shirt or tank in the Summer or sitting in the back porch in the morning with coffee. Works really well for leaks. I normally wear Knix XS and I ordered the XS for the dream boxer. However, I could have gone with a small in space. Keeping my fingers crossed that they will add more fabric designs in the future because I will snap them up in a heartbeat! I am 4’11” and 110 lb.

    Leslie P.
    Verified Buyer
    Was this helpful?

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