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SuperPlus Leakproof® No-Show Boybrief

$39.00 USD

Mix, Match & Save: 3+ for $33 each
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Absorbs 7-11 super tampons

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Front-to-back liner

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Bonded seams prevent leaks

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Machine washable

Megan has 36.5” hips and wears KNIX S | Twilight Navy

Megan has 36.5” hips and wears KNIX S

| Twilight Navy
Megan has 36.5” hips and wears KNIX S | Twilight Navy

Megan has 36.5” hips and wears KNIX S

Megan has 36.5” hips and wears KNIX S | Twilight Navy

Megan has 36.5” hips and wears KNIX S

| General

Megan has 36.5” hips and wears KNIX S

Color: Twilight Navy Limited Edition

Size:

True to Size

Size:

Size and Fit Guide

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.

Easy Exchanges within 30 Days

Returns

Returns

Sale & Last Call

Items discounted 30% and below are eligible for size exchange or store credit. Items discounted above 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.

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.

Rewards Members Earn 39 Points

Comfort-First Fit

Mid-rise boybrief silhouette with full bum coverage for a smooth, comfortable fit.

Ultimate Leakproof Protection

Our longest, most absorbent liner ever—front-to-back coverage without the bulk.

Day & Night Comfort

Buttery-soft stretch fabric moves with you, while bonded seams keep leaks contained and create a smooth, seamless look under clothing.

Machine Washable

Wash just like your regular underwear—easy, everyday care.

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Megan has 36.5” hips and wears KNIX S | Twilight Navy
| Twilight Navy
Megan has 36.5” hips and wears KNIX S | Twilight Navy
Megan has 36.5” hips and wears KNIX S | Twilight Navy
| General

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
    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

Drop
Drop
Drop
Drop
Drop
  • light period days
  • sweat
  • 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 4-8 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-4 super tampons
  • cup
    about 0.5-3 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • extra heavy period days
  • overnight protection
  • light bladder leaks
  • 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
PATENTED LEAKPROOF TECHNOLOGY

Our longest, most absorbent liner—ever.

Our original Fresh Fix Technology® features a built-in absorbent liner that soaks up about 7–11 super tampons’ worth of liquid—so you stay fresh, comfortable, and in control.

Soft Top Layer

Soft Top Layer

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

4.2
Rated 4.2 out of 5 stars
Based on 30 reviews
Total 5 star reviews: 18 Total 4 star reviews: 5 Total 3 star reviews: 3 Total 2 star reviews: 2 Total 1 star reviews: 2
77%would recommend this product
30 reviews
  • Rated 5 out of 5 stars
    22 seconds ago
    New to me

    Love these. They fit so well I ordered 4 more

    Gale S.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 days ago
    Good underwear

    Great

    Pamela B.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    Exactly what I was looking for

    I bought these for my teen during the last knix sale when the teen pairs were out of stock. I'm so glad that I did, my daughter loves them. She finds them comfortable and loves that she doesn't have to worry about leaks, especially for a girl who moves a lot in her sleep.

    Samantha
    Verified Buyer
  • Rated 5 out of 5 stars
    1 week ago
    So Comfy

    Perfect cut for my body and butt.

    Lauren
  • Rated 5 out of 5 stars
    2 weeks ago
    Excellent customer service and follow up

    Customer service is always prompt and responsive to reasonable requests.

    CJ W.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Boy brown

    Really like these! Never tried this kind before.

    Deborah S.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 weeks ago
    Comfortable

    I love these

    Ariel S.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    Great Fit

    These fit well and are super comfortable and protect against leaks. I am very happy.

    Jessica K.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    WOW!!

    Fit perfectly and feel great.

    Liza S.
    Verified Buyer
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Really nice coverage and feel!

    Deborah
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Love these! Haven’t used anything else in years for my cycle.

    Veroniqca
  • Rated 5 out of 5 stars
    1 month ago
    SUPER PURCHASE!

    These Boybriefs are great, just the right amount of body coverage, along with the fact they are the top absorbancy.

    Liza S.
    Verified Buyer