Leakproof Cotton Underwear Bikini

The comfiness of cotton, with the confidence of leakproof. Our newest floating liner tech sits comfortably on top of your undies to give extra protection from leaks, and is bonded at all the edges to trap in liquid absorbing the same as about 3 super tampons. You won’t notice the difference—other than the fact that your leak worries seem to float away.

Key Features:
- Cotton spandex blend for ultimate comfort
- Raised liner away from the body
- Bonded all around to help keep liquid in to prevent leaks
- Absorbs about the equivalent of 3 super tampons worth of period blood
- Certified according to OEKO-TEX® STANDARD 100, Product Class I : HK020 246396 TESTEX


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.

soft and comfy underwear with innovative leak protection built in
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Holds about 3 super tampons' or 1.5 regular pads' worth of blood.
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Allows air to circulate to keep you cool and dry.
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Texture feels smooth against the skin for added comfort.
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Simply care with mild detergent and machine wash on cold.

The comfiness of cotton, with the confidence of leakproof. Our newest floating liner tech sits comfortably on top of your undies to give extra protection from leaks, and is bonded at all the edges to trap in liquid absorbing the same as about 3 super tampons. You won’t notice the difference—other than the fact that your leak worries seem to float away.

Key Features:
- Cotton spandex blend for ultimate comfort
- Raised liner away from the body
- Bonded all around to help keep liquid in to prevent leaks
- Absorbs about the equivalent of 3 super tampons worth of period blood
- Certified according to OEKO-TEX® STANDARD 100, Product Class I : HK020 246396 TESTEX


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.

Machine wash cold, do not bleach, do not iron, do not dry clean, tumble dry low, wash with like colors.

Body: 96% Cotton/Coton, 4% Spandex

Fresh Fix Technology® Gusset: Gusset 1: 92% Polyester, 8% Spandex; Gusset 2: 95% Polyester, 5% Spandex; Gusset 3: 100% Polyester; 100% Thermoplastic Polyurethane 

Additional Product Ingredient Information

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 4.5 out of 5
Based on 11 reviews
  • 5 Stars
    7 Reviews
  • 4 Stars
    2 Reviews
  • 3 Stars
    2 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
82% of reviewers would recommend this product to a friend
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
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Review posted
Reviewed by Crystal B.
Verified Buyer
Height
<5’5”
Usual Pant Size - Knixteen
Womens 16-18
Size Purchased - Knixteen Underwear
L
Rated 5 out of 5

Most Comfortable, BEST FIT

Nothing makes me feel cleaner/dryer than cotton. It's the most comfortable and best fit for me by far. No rolling/sliding down. Everything stays put and keeps me feeling like it's any other day <3

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I recommend this product
Comfort
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
Effectiveness
Rated 5 out of 5
Ease of Use
Rated 5 out of 5
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Review posted
Reviewed by Frances B.
Verified Buyer
Rated 5 out of 5

Amazing!

Love your inconsistence/period undies. Wear them every day. High quality.

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Review posted
Reviewed by Amber L.
Verified Buyer
Pant Size
Teen 4-10
Size Purchased
M
Usage
  • Primary Protection
  • Period
  • Back-up Protection
Rated 5 out of 5

Very comfortable

These are so comfortable and work great. They are a much better style than others that I’ve tried.

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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 Ellie T.
Verified Buyer
Rated 5 out of 5

Perfect period underwear

Fit perfect, true to size, love them!

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I recommend this product
Effectiveness
Rated 5 out of 5
Comfort
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
Ease of Use
Rated 5 out of 5
Ease of Use
Rated 5 out of 5
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Review posted
Reviewed by Rocio P.
Verified Buyer
Rated 5 out of 5

Teen bikini

Love my teens bikini ultra leakproof.

Working great, very confortable

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