Your Bag

Your cart is empty

But you're full of potential..
Rewards Members Earn 0 Points

Suggestions

Top Picks

Super Leakproof® Dream Short

$48.00 USD

Color: Tapestry Limited Edition

Revolution V-Neck Bra

$65.00 USD
10% off Bra & Underwear Sets*

Color: Warm Sand

FreeFlex™ Demi Bra

$68.00 USD
10% off Bra & Underwear Sets*

Color: Black

Home / Boyshort Underwear / Super Leakproof® No-Show Boyshort
New

Super Leakproof® No-Show Boyshort

$29.00 USD

Mix & Match: 3+ for $25 each
Checkmark

Absorbs about 6 super tampons

Checkmark

Invisible under clothes

Checkmark

Extended gusset for extra protection

Checkmark

Machine washable

Shivani has 40” hips and wears KNIX L | Twilight Navy

Shivani has 40” hips and wears KNIX L

| Twilight Navy
Shivani has 40” hips and wears KNIX L | Twilight Navy

Shivani has 40” hips and wears KNIX L

Shivani has 40” hips and wears KNIX L | Twilight Navy

Shivani has 40” hips and wears KNIX L

| General

Shivani has 40” hips and wears KNIX L

Absorbency: Heavy

Heavy
Drop
Drop
Drop
Drop
Drop
about 4-7 super tampons
Essential
Drop
Drop
Drop
Drop
Drop
No Absorbency
Light
Drop
Drop
Drop
Drop
Drop
about 1-3 regular tampons

Color: Twilight Navy Limited Edition

Size:

True to Size

•

Size:

Size and Fit Guide

Free Shipping on orders $100+

Shipping

Shipping
Processing Time

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* USD = Free standard Shipping (4-8 business days)**
Expedited = $4.99 USD (3-6 business days)**

Orders under $100* USD = $7.99 USD Standard Shipping (4-8 days)**
Expedited = $9.99 USD (3-6 business days)**

*After discounts, before shipping and taxes. Processing times not included in estimates.
**Military Addresses Excluded. Standard Military Address Shipping = $10.00 USD (est. varies per location)
Easy Exchanges within 30 Days

Returns

Returns

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.

Sale & Last Call

Items discounted below 30% are eligible for size exchange or store credit. Items discounted 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.
Rewards Members Earn 29 Points

Comfort-First Fit

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

Worry-Free Protection

Patented bonded edges help prevent side leaks.

Heavy Absorbency

Absorbs 6 Super tampons worth of liquid—perfect for heavy flow days, overnight protection, and light bladder leaks.

No More Panty Lines

Made from our signature buttery-soft fabric and designed to be invisible under clothes, including leggings.

Easy to Wash

Machine washable just like regular underwear.

Zoom

Shivani has 40” hips and wears KNIX L | Twilight Navy
| Twilight Navy
Shivani has 40” hips and wears KNIX L | Twilight Navy
Shivani has 40” hips and wears KNIX L | 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

Built-in protection that feels like nothing at all

Our original Fresh Fix Technology® features a built-in absorbent liner absorbing about 3-6 super tampons worth of liquid so you feel fresh and in-control.

Soft Top Layer

Soft Top Layer

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

Holiday Top Picks

Shop All Arrow Right

Overnight Favorites Gift Set

From 
$83.00 USD

The Quintessential Sleep Set

$128.00 USD

Color: Ivory Limited Edition

MNTD Cotton Modal Brief 3-Pack

From 
$70.20 USD
$78.00
Save $8

Shimmer Stretch Bra

$55.00 USD
10% off Bra & Underwear Sets*

Color: Black

Leakproof UltraThin No-Show Bikini Shimmer 3-Pack

$75.00 USD

Color: Tapestry/Burnished Gold/Dark Cherry Limited Edition

SculptRib™ Cotton Long Sleeve Top

$58.00 USD

Color: Black

WingWoman Contour Bra

$68.00 USD
10% off Bra & Underwear Sets*

Color: Black

Modal Rib Henley Sleep Set

$68.00 USD

Color: Black

4.6
Rated 4.6 out of 5 stars
Based on 3,984 reviews
Total 5 star reviews: 3.1k Total 4 star reviews: 492 Total 3 star reviews: 148 Total 2 star reviews: 104 Total 1 star reviews: 110
93%would recommend these products
ComfortRated 4.7 on a scale of 1 to 5
EffectivenessRated 4.6 on a scale of 1 to 5
FitRated 0.0 on a scale of minus 2 to 2
Ease of UseRated 4.6 on a scale of 1 to 5
Write a Review (Opens in a new window)
3,984 reviews
  • Rated 5 out of 5 stars
    3 weeks ago
    Very happy

    I love these. I feel more secure when wearing them. I just don’t worry about being out anymore.

    Charlene M.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    1 month ago
    4 Stars

    More comfortable and does not ride up like other newer cuts, but still not as comfortable as original versions.

    Lorin
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Leakproof for life!

    I've been using Knix leakproof underwear for about 5 years now. After trying a couple other brands, I found Knix and haven't looked back. They are smooth and invisible under clothing, so comfortable, and even the fabric in the gusset is soft and doesn't chafe (unlike another brand I won't name). I just love these and have gotten my sister's and nieces hooked on them as well.

    Leslie C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Great underwear

    Great for my heavy days. The underwear is so comfortable. I used to have to double up on tampons and wear a pad to not bleed though! Now I’m down to just a single tampon and knix underwear! (Hoping to get rid of the tampon completely!)

    Meagan G.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    1 month ago
    fussy girl

    i like the newermore coverage boyshort in all honesty.

    Sharie K.
    Verified Buyer
    Was this helpful?
  • Rated 3 out of 5 stars
    1 month ago
    Love the fit - not enough coverage for real leakage protection.

    Like all the knix underwear I have bought, I love the fit and feel, but unfortunately the gusset in the front is not enough. It should go up another 2 inches in my opinion. These would also benefit from another two inches in the back. I don't know who these people are with a "heavy flow" but for me it they just don't prevent leakage the way they are made now. There's no way they absorb 6 super tampons worth. Not because they can't absorb that much, but they just don't absorb fast enough, so there is leakage in the front and in the back on my heavier days. These are fine for the 4th day on for me, but not on days 1-3. I just wish the "super leak proof" options had more coverage, front and back - but not all the way up the back like the "ultra" leakproof. If these problems were addressed I would definitely buy more!

    Dione
    Verified Reviewer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Great Boyshort Brief

    I have purchased several boyshort leakproof briefs from Knix and this one is the best. The fit is perfect and the leakproof feature is better than ever! Thank you.

    Pat M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Boyshorts

    Not sure about these. They are very comfortable but I thought I was buying for overnight protection and they did not do the job properly. So have not worn them for a full day.

    I like them and they are comfortable so may add to my stockpile buy for day wear only.

    Maureen P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    More front coverage! YES!!!

    These Super Leakproof Boyshort 2.0 underwear have made me return to Knix. The extended gusset creates significantly more front coverage!

    TL
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Very comfy and used to come in many colours

    I LOVE these shorts, and have worn nothing else for the past 5 years. I have about 20 pairs. I would like to replace some of my oldest pairs, but I n oh rice that you only seem to have about three colours available. Part of the reason I like this underwear is the beautiful colours and patterns they come in. When will you offer them in more colours?

    Karon F.
    Verified Reviewer
    Was this helpful?
  • Rated 4 out of 5 stars
    1 month ago
    4 Stars

    They were too big. I wear a size 16 pants, I have a bg butt and an xl was too big. If i wore them like boyshorts they sag in the crotch. I wanted boy shorts because I wanted them to fit around my leg. I should have gotten a large. They did the job and Id buy them again just get a smaller size.

    Marsha
    Was this helpful?
  • Rated 2 out of 5 stars
    1 month ago
    Waist Too short

    Not comfortable because the waist was too short.

    Linda G.
    Verified Buyer
    Was this helpful?