Period Kit

Feel cute, comfortable, and confident with our all-in-one kit, featuring two black Super Leakproof Underwear, two Limited-Edition Leakproof Underwear*, one black Super Sleepover Short, plus a reusable pouch* to hold all your necessities. All styles are 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 3-12 tampons.

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

*Style may vary.

everything teens need for light days, heavy days, and in-between days.
Image of a chrome heart surrounding text
Image of a absorbancy surrounding text
Holds up to 3-12 tampons or pads worth of blood.
Image of a moisture fabric surrounding text
Rapidly absorbs moisture to keep you fresh and dry all day.
Antimicrobial layer kills bacteria and neutralizes smells.
Image of a overnight protection surrounding text
Sleepover Short features a longer gusset to prevent leaks all night.

Feel cute, comfortable, and confident with our all-in-one kit, featuring two black Super Leakproof Underwear, two Limited-Edition Leakproof Underwear*, one black Super Sleepover Short, plus a reusable pouch* to hold all your necessities. All styles are 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 3-12 tampons.

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

*Style may vary.

Leakproof Underwear

Body: 77% Nylon, 23% LYCRA®

Gusset Liner: 86% Cotton, 10% Spandex, 4% Carbon

Gusset: Leakproof Technology


Free from PFAS and other chemical treatments.

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


Super Leakproof Underwear

Body: 70% Nylon, 30% Spandex 

Gusset Top Layer (Moisture Wicking + Anti-Odor): 87% Seaweed Fiber, 13% Modal 

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

Gusset 3rd Layer: Fresh Fix Technology 

Gusset 4th Layer (Waterproof Membrane): Polyurethane Film


Free from PFAS and other chemical treatments. 

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


Super Sleepover Short

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 $70. 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.

*Due to warehouse updates, orders placed January 15-21 will be processed starting January 22.


US Orders: Please allow 3–10 business days for orders to arrive. 

International Orders: Please allow 10–25 business days for orders to arrive.  


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

CANADIAN CUSTOMERS: Shop www.knixteen.ca to order in Canadian currency.

Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
Image of a chrome heart surrounding text
for the planet!
Image of a chrome heart surrounding text
FOR THIS GENERATION
nothing is tmi here—we promise.
Image of a chrome star surrounding text

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.

Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Image of a chrome heart surrounding text
Comfortable
Image of a chrome heart surrounding text
Sustainable
Image of a chrome heart surrounding text
Absorbent
Reviews
average rating 4.9 out of 5
Based on 288 reviews
  • 5 Stars
    264 Reviews
  • 4 Stars
    24 Reviews
  • 3 Stars
    0 Reviews
  • 2 Stars
    0 Reviews
  • 1 Star
    0 Reviews
100% of reviewers would recommend this product to a friend
288 Reviews
Reviewed by Elora
Verified Buyer
(closed) Period Kit
Reviewing
(closed) Period Kit
I recommend this product
Rated 4 out of 5
Review posted

Nice products and customer service... slow shipping

Hi! I am a teen girl who has been wanting period undies for a while, after debating about it for a long time, my mom and I ordered the period kit and one pair of extra undies (with the discount code we used it came to be the same price as just the kit!) The shipping took over 3 weeks to come from Toronto to Halifax where we live but luckily the day they undies arrived I started my period (lol) For reference I am 5'4", 120 pounds and have 36" hips. From these measurements I ordered a size large. The underwear fit good but if they stretched they would be too big and the shorts were huge. I contacted the company and they said that the products should fit SNUG AT FIRST AND RELAX WITH WEAR so keep that in mind when you purchase. The Knixpert I spoke with was extremely kind and gave me a full refund so I could rebuy the kit in a size medium instead. I did, and they just came today and are a much better fit!

The underwear is super comfy and does not show underneath leggings! The material is comparable to swimsuit bottoms and the fit is awesome. I ordered the boyshort style to have that little bit more coverage and am in love. I wore these on my period and they stopped any leaking. I was able to wear them alone on my lighter days and instead of a liner on heavier days. The only thing that was weird is that only my first package came with the Knixteen swag. I would have liked to see the second set we got have it as well but I'm happy with what I have :)

Overall, even though these…

Loading...
Was this helpful?
Reviewed by Brittany C.
Verified Reviewer
(closed) Period Kit
Reviewing
(closed) Period Kit
I recommend this product
Rated 5 out of 5
Review posted

The best first period kit!

I bought this for my 11 year old who is about to get her period. She was so excited and feels comfortable and confident for her first period.

Loading...
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 Sam
Verified Reviewer
(closed) Period Kit
Reviewing
(closed) Period Kit
I recommend this product
Rated 5 out of 5
Review posted

Awesome!

My 13 year old daughter was so excited about this Period Kit! She loves the underwear and the Knixteen swag was an added bonus.

Loading...
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 Jen
Verified Reviewer
(closed) Period Kit
Reviewing
(closed) Period Kit
I recommend this product
Rated 5 out of 5
Review posted

In Love!

My daughter loves her period kit! It's her first time using "period underwear" and these ones are so comfortable and keeps her feeling dry. She loves the shorts too and has been wearing them around the house non-stop while we're quarantined. Such a great way to try out the brand and get some cute swag too.

Loading...
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 Nadine B.
Verified Buyer
(closed) Period Kit
Reviewing
(closed) Period Kit
I recommend this product
Rated 5 out of 5
Review posted

Period kit for 11 year old

My daughter loves the Boyshort Underwear, this helps so much with the fear and anxiety around daytime leaks and makes her heavy period a little less terrible. The sleep shorts are saving us having to deal with stained sheets every morning as well. Love this product! Wish these were available when I was a teen.

Loading...
Was this helpful?