Super Leakproof Sleepover Short

Our most absorbent nighttime underwear features a longer gusset (designed to fight period stains and leaks while you snooze!) and an ultra-comfy, bum-covering style. Made with our patented, 3-layer leakproof technology built in.

 

First layer: Moisture-wicking, antimicrobial technology wicks away sweat and moisture while neutralizing odors to keep you fresh all day long. 

Second layer: A super thin, highly-absorbent liner that holds the power of 12 tampons or pads.

Third layer: A secure, liquid-resistant outer layer keeps leaks from happening. 

meet the most absorbent nighttime period underwear ever.
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Holds up to 12 tampons or pads worth of blood.
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Rapidly absorbs moisture to keep you fresh and dry all day.
Antimicrobial layer kills bacteria and neutralizes smells.
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Designed with a longer gusset to prevent leaks all night long.

Our most absorbent nighttime underwear features a longer gusset (designed to fight period stains and leaks while you snooze!) and an ultra-comfy, bum-covering style. Made with our patented, 3-layer leakproof technology built in.

 

First layer: Moisture-wicking, antimicrobial technology wicks away sweat and moisture while neutralizing odors to keep you fresh all day long. 

Second layer: A super thin, highly-absorbent liner that holds the power of 12 tampons or pads.

Third layer: A secure, liquid-resistant outer layer keeps leaks from happening. 

Body: 70% Nylon, 30% LYCRA® 

Gusset Top Layer: 84% Modal, 8% Seaweed Fiber, 8% Spandex 

Gusset 2nd Layer: 100% Polyester 

Gusset 3rd Layer: LeakProof Technology™


Free from PFAS and other chemical treatments. 

Machine wash cold with mild detergent. Do not bleach. Tumble dry on low.

We’ve extended our First Pair Risk-Free Policy* to give everyone a chance to try our new sizes. So even if it’s not your first order with Kt, you can return or exchange your period underwear until March 31, 2022. 

If you ordered the wrong size of period underwear, we’ll send you a different pair at no cost or offer you a standard refund within 30 days of delivery (excluding original shipping fees). If your order included multiple period underwear, open, wash and wear one pair only. That way if you don’t love them, any unopened packages from the same purchase will be eligible for an exchange or standard refund (excluding original shipping fees). All unopened packages will be donated to local organizations to support people in need. 

*Policy does not apply to sale or last call items.

We offer free shipping on all orders over $80.

We ship our items via DHL or Canada Post depending on your location. Please allow 1-2 business days for your items to be processed and shipped.


Canadian Orders: Please allow 2–4 business days for shipping to the GTA, 3–10 business days for urban areas, and 6–15 business days for remote locations.


NOTE: Orders placed on Friday after 1 PM will not be processed until the following Monday.

FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
nothing is tmi here—we promise.
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Super Absorbency

Absorbs 9–12 tsp (45–60 ml) of blood—that’s about 9–12 regular tampons or pads! Perfect for overnight protection or your heaviest days when changing into a fresh pair might not be convenient.


High Absorbency

Absorbs 4–8 tsp (20–40 ml) of blood, or the equivalent of 4–8 tampons or pads. These are perfect for heavy flow days.


Medium Absorbency

Absorbs up to 3 tsp (15 ml), or about 3 tampons or pads worth of blood. Ideal for light to medium flow days or as backup to tampons or period cups.

All of our period underwear, swimwear, reusable pads, and activewear have our patented, 3-layer leakproof technology built right in.

First Layer: Moisture-wicking, antimicrobial technology wicks away sweat and moisture while neutralizing odors to keep you fresh all day long. 

Second Layer: A super thin, highly absorbent liner that holds the power of 3–20 tampons or pads.

Third Layer: A secure, liquid-resistant outer layer keeps leaks from happening. 

The short answer: nope! Depending on the absorbency level of your period underwear and the heaviness of your flow, you can wear our period undies on their own or as a backup to pads, tampons, or menstrual cups. You can wear our High and Super absorbency underwear alone and be totally protected, while our Medium absorbency underwear can be worn alone on lighter days or as backup on heavier days.

Step 1: Give your underwear a quick rinse under cold water.
Step 2: Throw it in the washing machine with your regular clothes. Wash on cold with mild detergent (no softener or bleach).
Step 3: There are two ways to dry them depending on the undies you have: lay flat to dry for medium absorbency products, or tumble dry on low for high to super absorbency products.
Step 4: That’s it! No ironing needed.

Check out our size chart here. If you want some help, we have virtual fitters ready on deck to help you find your perfect fit. Book a video call with them today.

We’ve extended our First Pair Risk-Free Policy* to give everyone a chance to try our new sizes. So even if it’s not your first order with Kt, you can return or exchange your period underwear until March 31, 2022.

If you ordered the wrong size of period underwear, we’ll send you a different pair at no cost or offer you a standard refund within 30 days of delivery (excluding original shipping fees). If your order included multiple period underwear, open, wash, and wear one pair only. That way if you don’t love them, any unopened packages from the same purchase will be eligible for an exchange or standard refund (excluding original shipping fees). All unopened packages will be donated to local organizations to support people in need.

*Policy does not apply to sale or last call items.

COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
Reviews
average rating 4.5 out of 5
Based on 59 reviews
  • 5 Stars
    44 Reviews
  • 4 Stars
    7 Reviews
  • 3 Stars
    4 Reviews
  • 2 Stars
    2 Reviews
  • 1 Star
    2 Reviews
92% of reviewers would recommend this product to a friend
Quality
Rated 4 out of 5
Comfort
Rated 4 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to SIze and 2 is Fits Large
Effectiveness
Rated 4 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
59 Reviews
Reviewed by Rockin40’s
Verified Reviewer
I recommend this product
I'm a...
Adult
I purchased for...
Myself
Pant Size
Teen 12-16
Size Purchased
L
Usage
  • Period
Rated 5 out of 5
Review posted

Size & Customer Service

If you are having trouble deciding on size, please read all the way through.

I will try to remember to update my review once I’ve actually tried these during my period. For now, my review is based solely on fit/size and customer service.

I am a woman in my 40’s - I am 5’2, 117 pounds with 36” hips. In clothing I am generally a size small, but sometimes in panties I am a medium. I cannot stand underwear that cuts into the inside of my thigh.

In the regular/adult Knix line I wear a small. I can wear the medium, but they do stretch over time.

I wanted to order from the KT line as I preferred the fun colours offered.

I ordered 2 Period Kits that include the Sleepover Short. One kit with the Super Leakproof Boyshort option and one kit with Leakproof Bikinis. Based on the size chart and some reviews I ordered both kits in a size medium.

The Sleepover Shorts, in medium, fit perfect, they are my favourite part of these kits. The bikini and boyshorts were both too small. The bikinis were not as tight as the boyshort, but both were too tight around the inside of my thigh. I realize these will probably stretch some too, but the medium was just far too tight - very uncomfortable for me - I needed a large.

I contacted customer service and they were excellent. KT allowed me to exchange the boyshorts and bikinis for a large and I could keep the sleep short in medium. As per the return instructions, I only opened one pair of boyshorts and one pair of bikini. KT advised I was…

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Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to SIze and 2 is Fits Large
Effectiveness
Rated 5 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?
Reviewed by Sarah B.
Verified Buyer
I don't recommend this product
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Teen 12-16
Size Purchased
M
Usage
  • Primary Protection
Rated 2 out of 5
Review posted

Fit very large, leg opening is huge

We generally love Knix panties. I ordered 3 pairs of Super Overnight shorts, in the same size that we usually purchase. They are very big, the leg opening is not at all fitted. This is disappointing as they can't be returned and we won't likely use them and they are pricey.

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Quality
Rated 4 out of 5
Comfort
Rated 3 out of 5
Sizing
Rated 2 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to SIze and 2 is Fits Large
Effectiveness
Rated 3 out of 5
Fit
Rated 2 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?
Reviewed by Abby
Verified Reviewer
I recommend this product
I'm a...
Teenager
I purchased for...
Myself
Pant Size
Teen 18-20
Size Purchased
XL
Usage
  • Primary Protection
  • Period
Rated 5 out of 5
Review posted

MY SHEETS THANK YOU!!!!!!!!

My periods are SUPER heavy, I love this protection for sleeping. I have only had a few periods and I have leaked onto my bed EVERY SINGLE NIGHT! these make it easier for me to sleep with less worry of waking up at 2 am with blood ALL OVER my sheets. These make shark week SO much easier, thank you sooooooo much! I would highly recommend to ANYONE with a heavy period. I love these!

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Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to SIze and 2 is Fits Large
Effectiveness
Rated 5 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?
Reviewed by Robin
Verified Buyer
I recommend this product
I'm A
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Teen 4-10
Size Purchased
M
Usage
  • Period
  • Primary Protection
  • Back-up Protection
  • Sweat
Rated 5 out of 5
Review posted

Must have!

Amazing! My teen has a heavy flow and was constantly dealing with embarrassing leaks. Thanks to KT, she can go anywhere without fear of embarrassment or finding inventive ways to carry a change of clothes. Who would’ve thought that a pair of panties could boost confidence?!

Loading...
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to Size and 2 is Fits Large
Effectiveness
Rated 4 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?
Reviewed by Lisa G.
Verified Buyer
I recommend this product
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Kids 16-20
Size Purchased
L
Usage
  • Primary Protection
  • Period
Rated 4 out of 5
Review posted

Sleepshorts for tweens

My 11 year old has requested more sleep shorts. The pad is higher at the back and great for catching leaks.

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Quality
Rated 4 out of 5
Comfort
Rated 3 out of 5
Sizing
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to SIze and 2 is Fits Large
Effectiveness
Rated 4 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Was this helpful?