Triangle Bikini Top

Easy and adjustable, the Triangle Bikini Top is a summer staple. With a secure underband and straps that criss-cross in the back—you get elevated support and style. Mix and match it with our Swim Short, Full-Coverage Bikini Bottom, or Twist High Rise Bikini Bottom for a period-proof suit that’s totally you!

Other Features:

- Fully lined

- Removable cups

- 50+ UPF protection

A go-to classic swim top that pairs perfectly with any Kt leakproof bottom.
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Image of a seawater resistant surrounding text
Seawater & chlorine resistant means less fading & longer wear.
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Built with 50+ UPF protection to block out harmful rays.
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Designed to provide ultimate comfort and support.
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Simply machine wash on cold and lay flat to dry.

Easy and adjustable, the Triangle Bikini Top is a summer staple. With a secure underband and straps that criss-cross in the back—you get elevated support and style. Mix and match it with our Swim Short, Full-Coverage Bikini Bottom, or Twist High Rise Bikini Bottom for a period-proof suit that’s totally you!

Other Features:

- Fully lined

- Removable cups

- 50+ UPF protection

Machine wash cold and lay flat to dry. Do not bleach, iron, or dry clean. 


Body: 85% Nylon, 15% Spandex

Lining: 85% Nylon, 15% Spandex

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 $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. During high volume periods, your order may take up to 7 business days to dispatch from our warehouse location.


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.

FOR THE PLANET
FOR REAL LIFE
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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.

Our period swim bottoms contain a triple-layer gusset that absorbs your flow and locks in leaks, whether you're in or out of the water. When they go in the wash with detergent, the blood releases through the top layer—leaving your swimwear fresh and clean for next time. Yes, your other clothes will remain stain-free!

Here's the breakdown of our 3-layer leakproof technology:

Layer 1: A silky-smooth top layer that sits comfortably against the skin.

Layer 2: A highly-absorbent middle layer designed with our leakproof technology to absorb up to 1-3 tampons worth of period blood.

Layer 3: A waterproof outer layer prevents swelling. 

Not always. When your flow is light, our swimwear can be worn alone without any additional period protection. On super heavy days, we recommend wearing a tampon or menstrual cup with your swimwear. Every period is different though, and we recommend doing whatever makes you feel most confident.

Machine wash cold and lay flat to dry. Do not bleach, iron, or dry clean.

Check out our size chart here

Yes! All of our regular price swim bottoms and one-pieces are eligible for a return or exchange within 30 days of delivery, as long as the original sanitary strip and tags are attached. Our swim tops are eligible for a return or exchange within 30 days of delivery with original tags attached.

Absolutely! The leakproof liner built into all of our period swimwear is undetectable, so they look and feel just like regular swimwear.

Our styles are made to fit teen bodies. For period swimwear in adult sizes, please visit Knix.

COMFORTABLE
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
JUST PLAIN BETTER
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JUST PLAIN BETTER
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COMFORTABLE
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Reviews
average rating 5.0 out of 5
Based on 1 review
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100% of reviewers would recommend this product to a friend
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Reviewed by Alexa V.
Verified Buyer
Rated 5 out of 5

comfy, great colour, awesome bathing suit!

As per usual, knix has designed a great item! It is comfy and stretchy, adjustable, and all round a good product.

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