Super Leakproof® No-Show Underwear Boyshort

With the ability to hold about 4-7 super tampons' worth of blood, this super-absorbent bikini underwear works just as hard as you do—no backup needed. With our patented leakproof technology and quick-drying fabric, they’re a game-changer for training and recharging with protection against sweat, discharge, and blood, on heavy days or nights.

 

Key Features:

- Absorbs about 4-7 super tampons worth

- Quickly absorbs moisture to keep you fresh and dry 

- 100% reusable and machine washable 

 

Kt period underwear and pads are now sales tax-free in Canada.* We celebrate improvements to the accessibility and affordability of essential period care products. Learn More.

school. sofa. sleep. you’ll wear these period undies everywhere.
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Absorbs about 4-7 super tampons worth
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Rapidly absorbs moisture to keep you fresh and dry all day.
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Allows air to circulate to keep you cool and dry.
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Simply care with mild detergent and machine wash on cold.

With the ability to hold about 4-7 super tampons' worth of blood, this super-absorbent bikini underwear works just as hard as you do—no backup needed. With our patented leakproof technology and quick-drying fabric, they’re a game-changer for training and recharging with protection against sweat, discharge, and blood, on heavy days or nights.

 

Key Features:

- Absorbs about 4-7 super tampons worth

- Quickly absorbs moisture to keep you fresh and dry 

- 100% reusable and machine washable 

 

Kt period underwear and pads are now sales tax-free in Canada.* We celebrate improvements to the accessibility and affordability of essential period care products. Learn More.

Body: 70% Nylon, 30% Spandex 

Lining: 84% Modal, 8% Seaweed, 8% Spandex 

Gusset: Fresh Fix Technology®, 100% Polyester, PU Film

 

Machine wash cold with mild detergent, do not bleach, lay flat to dry.

Because they’re, well, underwear, we can’t accept exchanges or returns on used items. BUT you can try one pair from your first order risk-free for 30 days! 


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, we ask that you only open, wash, and wear one pair of underwear. That way if you don’t love them, any unopened packages from the same purchase will be eligible for an exchange or a standard refund (excluding original shipping fees).


All sale items are final sale and can’t be returned or exchanged.

Because they’re, well, underwear, we can’t accept exchanges or returns on used items. BUT you can try your first pair on your first order risk-free for 30 days!


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 a standard refund* (excluding original shipping fees).


All unopened packages will be donated to local organizations to support people in need.

We offer free standard 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. During high volume periods, your order may take up to 7 business days to dispatch from our warehouse location. 


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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Period underwear and pads are exempt from federal sales tax in Canada. They are also exempt from most provincial / harmonized sales taxes. But are subject to the following provincial sales tax rates which will apply to orders shipped to the following provinces and to orders purchased in retail stores located in the following provinces: British Columbia and Manitoba: 7% PST; Saskatchewan: 6% PST. 

Need more info? Click here

Each pair has a built-in liner that absorbs period blood. Kt Period Underwear is categorized by light, moderate and heavy flows so you can find the right pair for your teen’s needs.

Heavy Absorbency

Absorbs about the same as 4-7 super tampons. Perfect for overnight protection or your teens heaviest days when changing into a fresh pair might not be convenient.


Moderate Absorbency

Absorbs about 2.5 super tampons' worth of blood. Ideal for medium period days, discharge and sweat.


Light Absorbency

Absorbs about the same as about 1 regular tampon worth of blood, sweat or discharge. Ideal for lightest period days, spotting, sweat and discharge.

All of our period underwear, swimwear, reusable pads, and activewear have our patented leakproof technology built right in. Liner’s are discreet and comfortable, and fit for your teen’s unique flow. 

That’s up to your teen or tween! Every flow and comfort level is different.

Depending on the absorbency level of the period underwear and the heaviness of your teen’s flow, they can wear our period undies on their own or as a backup to tampons or menstrual cups. 

We always recommend they choose an option that makes them feel most confident!

Step 1: Give your teens 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.

Because they’re, well, underwear, we can’t accept exchanges or returns on used items. BUT you can try one pair from your first order risk-free for 30 days!

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, we ask that you only open, wash, and wear one pair of underwear. That way if you don’t love them, any unopened packages from the same purchase will be eligible for an exchange or a standard refund (excluding original shipping fees).

All sale items are final sale and can’t be returned or exchanged.

 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 15 reviews
  • 5 Stars
    12 Reviews
  • 4 Stars
    1 Review
  • 3 Stars
    1 Review
  • 2 Stars
    0 Reviews
  • 1 Star
    1 Review
87% 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
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Review posted
Reviewed by Krystal S.
Verified Buyer
Super Leakproof® No-Show Underwear Boyshort
Reviewing
Super Leakproof® No-Show Underwear Boyshort
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Teen 12-16
Size Purchased
XL
Usage
  • Period
  • Sweat
  • Other
  • Primary Protection
Rated 5 out of 5

Amazing product

Both my teen daughters love these underwear! Especially my oldest daughter she has sensory issues and will only we’re these under. She wears them everyday not just on the period.

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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
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Reviewed by Terrie Y.
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Super Leakproof® No-Show Underwear Boyshort
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Super Leakproof® No-Show Underwear Boyshort
Rated 5 out of 5

Love these

Great smooth feeling against my skin. Love the fabric choices as well.

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Reviewed by Bobbi
Super Leakproof® No-Show Underwear Boyshort
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Super Leakproof® No-Show Underwear Boyshort
Rated 5 out of 5

5 Stars

Love these!! So convenient

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Reviewed by Katrina V.
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Super Leakproof® No-Show Underwear Boyshort
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Super Leakproof® No-Show Underwear Boyshort
Rated 5 out of 5

Love the fit and feel

Not like other “bulky” period underwear. These are fashionable, sleek, and comfortable. My daughter loves how they fit and feel.

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Reviewed by Kadie D.
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Super Leakproof® No-Show Underwear Boyshort
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Super Leakproof® No-Show Underwear Boyshort
Rated 5 out of 5

First period panties

These were my daughter’s first pair of period panties. We have tried others since and had to return. She only wants Knix! Best fitting and comfiest!

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