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Best Seller

Light Leakproof No-Show Boyshort

$25.00 USD

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

Absorbs about 1 regular tampon

Invisible under clothes

Perfect for daily wear

Machine washable

Close-up image of gusset liner

Color: Midnight/Cherry Polka Dot Limited Edition

Size:

True to Size

•

Size:

Size and Fit Guide

Build Your 3-Pack

Light Leakproof No-Show Boyshort

Color: Midnight/Cherry Polka Dot Limited Edition

Size:

Size:

Light Leakproof No-Show Boyshort

Color: Midnight/Cherry Polka Dot Limited Edition

Size:

Size:

Light Leakproof No-Show Boyshort

Color: Midnight/Cherry Polka Dot 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

Holiday Return Policy
Eligible items purchased online or in stores between November 2, 2026 and December 31, 2026 may be returned through January 29, 2027. All other purchases fall under our 30 day Returns Policy.

Standard Return Policy
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 25 Points

Product Description

So thin, you’ll forget you’re wearing anything. This style has full bum and hip coverage. Our original leakproof technology offers a barely-there feel while absorbing about 1 regular tampon or pantyliner worth of liquid. Patented bonded edges help prevent against side leaks. These underwear feature our signature buttery soft fabric. No show construction is designed to be invisible under clothes, including workout leggings.

Comfort-First Fit

Boyshort silhouette with a mid-rise fit and extra hip and bum coverage.

Worry-Free Protection

Our original leakproof technology provides a barely noticeable feel. Patented bonded edges help prevent side leaks.

Light Absorbency

Absorbs 1 regular tampon worth of liquid—perfect for light flow days, sweat and discharge, and backup protection for heavy flow days.

No-Show Style

Buttery-soft and smooth fabric gives a seamless look and feel. Disappears under clothes, even leggings.

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
PATENTED LEAKPROOF TECHNOLOGY

Built-in protection that feels like nothing at all

Our original Fresh Fix Technology® features a built-in absorbent liner absorbing about 1 regular tampon worth of liquid so you feel fresh and in-control.

Soft Top Layer

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

4.6
Rated 4.6 out of 5 stars
Based on 7,656 reviews
93%would recommend these products
FitRated 0.0 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
Keywords
Keywords
Rating
Ratings
Height
Height
How do you use your Leakproof?
How do you use your Leakproof?
Usual Pant Size
Usual Pant Size
7,656 reviews
  • Rated 5 out of 5 stars
    5 days ago
    Underwear

    The best underwear ever invented.

    Soft and silky.

    Love them

    LR
    Louise R.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort
  • Rated 4 out of 5 stars
    1 week ago
    4 Stars

    Knix are my “go-to”. I’ve tried other brands that are bulky and look like granny panties. They are sleek and comfortable. My primary complaint about this product is that after several washes, the elastic binding will come undone. It is frustrating.

    Maybe buying a bundle will cut down on their laundry trauma.

    K
    Kelly
    Reviewing
    Light Leakproof No-Show Boyshort
  • Rated 5 out of 5 stars
    1 week ago
    Comfy

    Love these, hoever, I do wish they came up higher in the front. I find sometimes they slide down. Good butt coverage though.

    PH
    Paula H.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort 3-Pack - Last Call
  • Rated 5 out of 5 stars
    1 week ago
    review

    arrived promptly and as ordered

    PD
    Pam D.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort 3-Pack - Last Call
  • Rated 5 out of 5 stars
    1 week ago
    Love them!

    i love these no-show boyshorts! The fact that they come in a 3 pack, just makes them even better.

    SR
    Shelley R.
    Verified Buyer
    Reviewing
    POS - Light Leakproof No-Show Boyshort 3-Pack (ZSkus)
  • Rated 5 out of 5 stars
    1 week ago
    Great fit

    I ordered these for my girlfriend, and she loves the snug, comfortable fit without feeling as though they are too tight on her body. She’s happy with how well they hold up over time (washing them over time doesn't compromise their integrity). She also impressed with their absorbency.

    Overall, they’re reliable and comfortable, making them a solid choice for use while she is on or expecting her period.

    JZ
    Jeremy Z.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort
  • Rated 1 out of 5 stars
    1 week ago
    Wrong size

    I got the wrong size and it didn’t fit well. I’m between sizes and I thought the size that I got would fit well but it didn’t.

    JA
    Joe A. F.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort
  • Rated 5 out of 5 stars
    2 weeks ago
    Best underwear

    Best fit and feel - amazing quality

    FD
    Francesca D.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort 3-Pack - Last Call
  • Rated 5 out of 5 stars
    2 weeks ago
    Boyshorts are the best!

    The light leakproof boy shorts are my favorite now that the cheeks are no longer available. So cute and comfortable. Since they are a best seller, I don't understand why they aren't available in more colors? I would love more colors in this style.

    EA
    Emily A.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort 3-Pack - Last Call
  • Rated 5 out of 5 stars
    2 weeks ago
    Great multi-purpose protection

    These are great multi-purpose protection. They are comfortable, but I find slightly less breathable than cotton, but not bad. I would still recommend.

    RB
    Ruth B.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort 3-Pack - Last Call
  • Rated 5 out of 5 stars
    2 weeks ago
    Love these underwear!

    Enjoy not having to worry about my period or discharge leaking through my underwear anymore or having to buy panty liners. They don’t ride up and show no seams, so they work well with tight clothing.

    MK
    Madeline K.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort
  • Rated 5 out of 5 stars
    2 weeks ago
    ?? Light Leakprooof No-Show Boyshort

    I like them, and was just trying out one to see what it would be like. I think I would buy more later on.

    MW
    Marilyn W.
    Verified Buyer
    Reviewing
    Light Leakproof No-Show Boyshort

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