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But the perfect pair is waiting.

20% Off

Period Swim Full-Coverage Bikini Bottom

$36.00 USD

$45.00

Extra 10% off when you buy 4+
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Absorb about 2 super tampons

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Lower to mid-rise fit

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Full coverage style

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Premium UPF 50+ fabric

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Machine washable

| Black
| Black
| Black
| Black
| Black
Felixe (she/her) has 44” hips and is wearing a size XL | Black

Felixe (she/her) has 44” hips and is wearing a size XL

Felixe (she/her) has 44” hips and is wearing a size XL | Black

Felixe (she/her) has 44” hips and is wearing a size XL

Color: Black Limited Edition

Size:

True to Size

Size and Fit Guide

FREE Shipping on orders $70+

Shipping

Shipping

Processing Timelines

Please allow 1-2 business days for our warehouse team to pack and ship your order. During peak periods such as sales, holidays and product launches, please allow up to 4 business days for us to process your order. Once an order is placed, we cannot guarantee any address updates, order changes or cancellations. Orders placed on Friday after 1PM will not be shipped until the following Monday.

Delivery Timelines

For the most up to date delivery time estimates, please refer to the shipping timeline at checkout. All transit times are measured in business days which are Monday-Friday, excluding holidays.

Please note, all shipping timelines are estimates and are not guaranteed.

US Orders

Orders within the United States will be shipped with DHL and USPS or FedEx based on your address and carrier availability.

Please note: Orders over $700 may be subject to customs/duties upon receipt. Customers are responsible for any customs/ duties upon receipt of order. Orders are shipped from Canada.

Standard US shipping is free on eligible orders over $70 USD*. Orders under $70 USD are $10 USD for standard shipping depending on location.

*After discounts, before shipping and taxesWe are not able to ship to US territories (including Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands and American Samoa) at this time.

Return Policy

Return Policy

Return Policy

Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.

5 stars is really not enough “Seeing my 11 year old never skip a beat is invaluable! She never had to think twice about being on her period while we were at the beach, and most importantly to her, no one else had to know.”

- Kellie H.

Swim Style

A full coverage style with a mid-rise fit and full bum coverage.

Worry-Free Protection

Discreet, built-in protection that absorbs about 2 super tampons worth.

Sun-Smart Protection

UPF 50+ fabric protects your skin while you soak up the sun.

Zoom

| Black
| Black
| Black
| Black
| Black
Felixe (she/her) has 44” hips and is wearing a size XL | Black
Felixe (she/her) has 44” hips and is wearing a size XL | Black

How to Choose?

Heavy

Drop
Drop
Drop
Drop
Drop
  • Perfect for overnight protection or your teens heaviest days when changing into a fresh pair might not be convenient.
  • tsp
    about 8-14 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 4-7 super tampons
  • cup
    about 1.5-3 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • Ideal for lightest period days, spotting, sweat and discharge.
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

Drop
Drop
Drop
Drop
Drop
  • Ideal for medium period days, discharge and sweat.
  • tsp
    about 4-8 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-4 super tampons
  • cup
    about 0.5-3 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • Ultimate peace of mind. For the heaviest period days or overnight protection.
  • tsp
    about 15-20 tsp
  • pad
    about 1.5-2.5 super pads
  • tampon
    about 7-11 super tampons
  • cup
    about 2-3 menstrual cups
LEAKPROOF SWIM WORKS IN LAYERS

Built-in protection that feels like nothing at all.

Looks just like regular swimwear. Non-swelling liner and patented no-show design.

Soft Top Layer

Top Layer

Smooth and comfortable liner in swimsuit fabric.

Your questions, answered.

4.5
Rated 4.5 out of 5 stars
Based on 89 reviews
89 reviews
  • Rated 5 out of 5 stars
    13 hours ago
    Life Saver!

    I had purchased these to have on hand incase the situation arose over the summer when we have a pool or go on vacation. My daughter doesn't even have her period yet but I wanted to be prepared. Well, I didn't need them but my friend had confided in me the day before her family was going away on vacation and her daughter had just gotten her period for the first time and felt like it was going to ruin the trip. I rushed the bottoms over to her and she said it saved the trip. She was able to feel confident and enjoy her family trip. I was so happy that I was able to help. KT by Knix should feel so good about their product and letting young girls feel confident! I have since ordered a replacement so I'm back to being prepared if I need them. Or anyone else.

    Cynthia J.
    Verified Buyer
  • Rated 5 out of 5 stars
    3 days ago
    Great new swimwear!

    Fits great and just looks like a normal swimsuit! Thanks for great products for teens who aren’t wanting to use tampons yet!

    Irene O.
    Verified Buyer
  • Rated 3 out of 5 stars
    2 weeks ago
    Watch out for the lighter colors

    So far they work however we purchased a lighter color and my daughter won’t wear it in public because you can see the black liner through the color when wet. I’d call it a design flaw for sure, so wasted money we now have to purchase black to avoid this. To the design team, lighter color bottoms should also have a light colored liner….just a thought!

    Stephanie
  • Rated 5 out of 5 stars
    2 months ago
    Wow

    Amazing product. Really hugs the hips.

    Ben
  • Rated 5 out of 5 stars
    3 months ago
    My daughter loves it

    It’s wonderful

    Rufina A.
    Verified Buyer
  • Rated 5 out of 5 stars
    7 months ago
    Period swim full coverage bikini bottom

    The full coverage fit is age appropriate and wish you also sold non-period bottoms of same full coverage profile and in fun colors. It is hard to find a good full coverage bottom in most of the bathing suit stores - they are all so cheeky and/or high cut.

    Beth S.
    Verified Buyer