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Home / Boxer Underwear / Super Leakproof® Dream Boxer™
Restocked

Super Leakproof® Dream Boxer™

$48.00 USD

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
| 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

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. Once an order is placed, we cannot guarantee any address updates, order changes or cancellations. Orders placed on Friday after 1PM will not be shipped until the following Monday.


Split Shipments

Most orders will ship from a single warehouse. However, we occasionally ship from a combination of warehouse locations, so you may receive your order in multiple parts. If items from your order ship in separate packages, we’ll send you tracking information for each package when it becomes available.

Delivery Timelines

For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines do not include processing times. See above for details. All transit times are measured in business days which are Monday-Friday, excluding holidays.

Please note, all shipping timelines are estimates and are not guaranteed.

We are not able to ship to US territories (including Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands and American Samoa) at this time.
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 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 up to 9 super tampons. 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.

Our Best-Selling Underwear

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Super Leakproof® Dream Team 2-Pack

From 
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The Full Cycle Kit - Bikini

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4.6
Rated 4.6 out of 5 stars
Based on 395 reviews
Total 5 star reviews: 320 Total 4 star reviews: 32 Total 3 star reviews: 19 Total 2 star reviews: 9 Total 1 star reviews: 15
What our customers are saying
Customers say these boxer shorts are extremely comfortable and provide excellent overnight protection during periods. Many find them soft, breathable, and perfect for sleeping without worrying about leaks. Users appreciate the built-in absorbent underwear that doesn't ride up or squeeze. Common feedback includes praise for their comfort level and peace of mind during heavy flow nights. Several mention they run large, with some needing to size down for proper fit. While most love the coverage and protection, a few note concerns about gusset size or fit issues with the inner underwear portion.
89%would recommend this product
FitRated 0.2 on a scale of minus 2 to 2
ComfortRated 4.7 on a scale of 1 to 5
EffectivenessRated 4.6 on a scale of 1 to 5
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395 reviews
  • Rated 5 out of 5 stars
    22 seconds ago
    they are so comfortable

    I find that these live up to their name. I wii be ordering more to of these for sure.

    Zelma J.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    22 hours ago
    Really comfortable

    Boxers are good quality. They arent too heavy and fit well

    Kristen T.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    22 hours ago
    Comfortable and Flattering

    Felt secure all night and they didn’t dig into my waist like other period underwear. Not bulky, very discreet, and I feel cute wearing them. Sizing ran a little large but exchanging was easy.

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

    I bought these to sleep in. I have sciatica and the high cut inner brief and the small seams don't bother me when I lay on my side. I like that I don't have to worry about leaks during the night either. And the stripes are a fun element.

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

    The Boxers are great for pjs. I'm really pleased with them.

    Lesley M.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    2 days ago
    Cute and comfy

    Super comfy shorts, true to size.

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

    LOVE THEM!!! They are worth every penny. They are so cute and make me feel free and protected when I need it the most! I would give Knix more than 5 stars if I could!!

    Deborah K. B.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    3 days ago
    Simply Amazing

    Absolutely love these boxers

    So comfortable and do a great job

    Well done e Knix!!

    Tony T.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    These are from heaven!

    So comfy and cute! I think I can even wear them in the summer with the new boxer short trend.

    Kylee L.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    Great lounging shorts

    Comfortabke, light weight, perfect around the house shorts.

    Melanie D.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    5 days ago
    Obsessed

    My new favorite thing to wear during my time of the month! Need more asap! Some comfortable

    Joy K.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Love

    Absolutely love these sleep shorts

    Joanna H.
    Verified Buyer
    Reviewing
    Super Leakproof® Dream Boxer™
    Was this helpful?

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