Super Leakproof® No-Show Underwear Bikini

With the ability to hold about 3 super tampons’ or 1.5 regular pads' 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:

- Quick-Drying

- Moisture and Sweat Wicking

- Absorbs the same as about 3 super tampons or 1.5 regular pads

- Super soft & stretchy

- Invisible under leggings or shorts (aka no visible seam lines)

- Patented leakproof technology

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.

the power of 3 tampons or pads, without all the bathroom breaks.
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Holds the same as about 3 super tampons
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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 3 super tampons’ or 1.5 regular pads' 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:

- Quick-Drying

- Moisture and Sweat Wicking

- Absorbs the same as about 3 super tampons or 1.5 regular pads

- Super soft & stretchy

- Invisible under leggings or shorts (aka no visible seam lines)

- Patented leakproof technology

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.

For items with a 20% or more discount, you may exchange for another item or return for store credit. No refunds can be accommodated. 

Items marked as “Flash Sale” or “Clearance” are final sale, meaning no returns, exchanges or refunds can be accommodated. No exceptions. 

Please note: Sale items are not eligible for our First Pair Risk-Free Policy.

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 3 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 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 standard refund (excluding original shipping fees).

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

 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 4.7 out of 5
Based on 495 reviews
  • 5 Stars
    412 Reviews
  • 4 Stars
    59 Reviews
  • 3 Stars
    9 Reviews
  • 2 Stars
    7 Reviews
  • 1 Star
    8 Reviews
97% 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
Write a Review
Review posted
Reviewed by Charlene De M.
Verified Buyer
Super Leakproof® No-Show Underwear Bikini
Reviewing
Super Leakproof® No-Show Underwear Bikini
I'm a...
Adult
I purchased for...
Myself
Pant Size
Teen 12-16
Size Purchased
L
Usage
  • Primary Protection
  • Period
Rated 5 out of 5

Impressed

I’m 39. I used these for the first time day 1 of my flow this week. Which is a super heavy one. And WOW! no leaks, super absorbent not super messy like pads, a lot more comfortable when taking a #2, unlike a diva cup, that’s also wants to push out. Still more comparable to a pad but a lot more comfortable. No leaks over night. It’s was super easy to exchange my unopened pairs to size up on my first order. They even let me keep the open pair and sent me the appropriate new size for that pair. I will 100% be recommending and ordering again.

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I recommend this product
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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Review posted
Reviewed by Stephanie L.
Verified Buyer
Super Leakproof® No-Show Underwear Bikini
Reviewing
Super Leakproof® No-Show Underwear Bikini
Pant Size
Teen 00-2
Size Purchased
S
Usage
  • Primary Protection
Rated 5 out of 5

Gymnastics

My daughter was able make it through a 3 hour gymnastics meet without needing to go to the bathroom worried about a leak! Prancing around in her skimpy leotard worry free! No leaks and couldn't tell she was wearing underwear! LOVE these!

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I recommend this product
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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Review posted
Reviewed by Jolie G.
Verified Buyer
Super Leakproof® No-Show Underwear Bikini
Reviewing
Super Leakproof® No-Show Underwear Bikini
Pant Size
Kids 8-10
Size Purchased
XS
Usage
  • Period
Rated 5 out of 5

Perfect for my 13 yo to sleep in

I purchased these in preparation. My daughter thinks these are comfy and are perfect for her to sleep in when she starts.

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I recommend this product
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 Lauren A R.
Verified Buyer
Super Leakproof® No-Show Underwear Bikini
Reviewing
Super Leakproof® No-Show Underwear Bikini
Rated 5 out of 5

Love

The fit is very good, and dryness is super.

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Reviewed by Jojo
Verified Buyer
Super Leakproof® No-Show Underwear Bikini
Reviewing
Super Leakproof® No-Show Underwear Bikini
Rated 5 out of 5

Leakproof Undies

These bright green bikinis are really leakproof! I also like the cheerful color.

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