Leakproof Cotton Modal Underwear Bikini

A highly absorbent bikini in super soft cotton modal fabric, with our patented leakproof technology that absorbs the same as about 2 super tampons or 1 regular pad built right in.

it doesn’t get any softer than this.
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Holds about 2 super tampons' or 1 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.

A highly absorbent bikini in super soft cotton modal fabric, with our patented leakproof technology that absorbs the same as about 2 super tampons or 1 regular pad built right in.

Main Body: 47% Cotton, 47% Modal, 6% Spandex 

Gusset Top Layer (Moisture Wicking + Anti-Odor): 84% Modal 8% Seaweed 8% Spandex 

Gusset 2nd Layer (Absorbent Fabric): 100% Polyester 

Gusset 3rd Layer Fresh Fix Technology 

Gusset 4th Layer (Waterproof Membrane): Polyurethane Film   


Machine wash cold with mild detergent, do not bleach, tumble dry on low.

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! Learn more about 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 4.6 out of 5
Based on 693 reviews
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    18 Reviews
93% 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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Reviewed by Christy W.
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Leakproof Cotton Modal Underwear Bikini
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Leakproof Cotton Modal Underwear Bikini
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Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Kids 12-14
Size Purchased
L
Usage
  • Back-up Protection
Rated 5 out of 5

Confidence Booster!

Great fit, provides assurance!

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Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
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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
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Rated 4 out of 5
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Reviewed by Deborah W.
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Leakproof Cotton Modal Underwear Bikini
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Leakproof Cotton Modal Underwear Bikini
Rated 5 out of 5

Comfort

I like the style and fit

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I recommend this product
Comfort
Rated 5 out of 5
Effectiveness
Rated 5 out of 5
Sizing
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
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Review posted
Reviewed by Donna J R.
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Leakproof Cotton Modal Underwear Bikini
Reviewing
Leakproof Cotton Modal Underwear Bikini
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Kids 8-10
Size Purchased
XS
Usage
  • Primary Protection
  • Incontinence
  • Period
  • Sweat
Rated 5 out of 5

Well made!

My daughter finds these super comfortable and breathable as she has to be in a wheelchair all day. The cotton modal fits her better than the previous knix we had purchased.

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Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Sizing
Rated -1 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 Malika Petty C.
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Leakproof Cotton Modal Underwear Bikini
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Leakproof Cotton Modal Underwear Bikini
Rated 5 out of 5

My favorite

This one is my favorite! Great protection and comfy fit.

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I recommend this product
Comfort
Rated 5 out of 5
Effectiveness
Rated 5 out of 5
Sizing
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
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Reviewed by Shelley G.
Verified Buyer
Leakproof Cotton Modal Underwear Bikini
Reviewing
Leakproof Cotton Modal Underwear Bikini
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Kids 12-14
Size Purchased
XS
Usage
  • Primary Protection
Rated 5 out of 5

Cotton

My daughter really likes to have the cotton ones, especially to wear to bed or under jogging pants.

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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 4 out of 5
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