Leakproof Cotton Modal Underwear Bikini

A highly absorbent bikini in modal, a naturally breathable fabric made from regenerative plants. Built with our patented, 3-layer leakproof technology built in.

First layer: 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 8 tampons.

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

it doesn’t get any softer than this.
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KT by Knix Period Underwear FAQs

Super Absorbency
A total replacement for disposable period products - absorbs approximately 8 tsp, 40 ml, or the equivalent of 8 regular tampons worth of liquid.

High Absorbency

Ready to stop leaks whenever - absorbs approximately 4-6 tsp, 20-30 ml, or the equivalent of 4-6 tampons worth of liquid.

Medium Absorbency
Confident backup protection for heaviest days - absorbs approximately 3 tsp, 15 ml, or the equivalent of 2 tampons worth of liquid.

Our Period Underwear features triple layer technology that ensures you stay fresh, dry, and protected. The anti-odor top layer wicks away moisture from your skin; the inner-layer absorbs the liquid and locks it in; and the leak resistant outer layer keeps any liquid from spotting your clothes.

Depending on the level of absorbency of leakproof period underwear you choose and the heaviness of your flow, you can wear our period panties on their own or as backup protection along with a pad or tampon. You're totally protected with our high and super absorbency leakproof underwear, while our low and medium absorbency leakproof underwear can replace pads and tampons on lighter days and work great as a backup for your usual period protection on heavier days.

Washing your period underwear shouldn't be complicated, so we designed our products to be super easy to wash and care for. For best results, machine wash on cold with mild detergent and tumble dry on low (Super Leakproof Underwear). That's it! Pro tips: Don't use softener or bleach and never iron.

You can find your size here

If you're still not sure which size underwear to get, just book a virtual fitting and someone from the kt team will video chat you to walk you through everything! Book Now

 

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!

How it works:

if your first order includes multiple period underwear: open, wash & wear one pair only to test them out. That way, in the unlikely event that you dont love them, any unopened packages from the same purchase can be exchanged or refunded back to you within 30 days of delivery (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 688 reviews
  • 5 Stars
    533 Reviews
  • 4 Stars
    95 Reviews
  • 3 Stars
    29 Reviews
  • 2 Stars
    15 Reviews
  • 1 Star
    16 Reviews
94% 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
Review posted
Reviewed by Christy W.
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
L
Usage
  • Back-up Protection
Rated 5 out of 5

Confidence Booster!

Great fit, provides assurance!

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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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Review posted
Reviewed by Nelofer B.
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
  • Period
Rated 5 out of 5

Very comfortable

Very very nice, my daughter said she finds sleeping on her period 100 times more comfortable as sleeping with a pad is very uncomfortable. 5 ⭐️ daughter wears small in pants but XS were perfect so they fit big.

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I recommend this product
Quality
Rated 5 out of 5
Comfort
Rated 5 out of 5
Sizing
Rated 2 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
Was this helpful?
Review posted
Reviewed by Andrea G.
Verified Buyer
Pant Size
Teen 18-20
Size Purchased
XL
Usage
  • Period
Rated 5 out of 5

Love these!!!

These are my new favorites! The cotton material is soft and breathable.

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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
Was this helpful?
Review posted
Reviewed by Daniela L.
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 16-20
Size Purchased
S
Usage
  • Back-up Protection
Rated 5 out of 5

Great fit

Nice product would buy 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 4 out of 5
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Review posted
Reviewed by Emma L.
Verified Buyer
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Teen 12-16
Size Purchased
XL
Rated 5 out of 5

Love these!

Great and easy to care for.

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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
Was this helpful?