Racerback Tankini Top
Pull on style and coverage with our new Racerback Tankini Top. The Tankini Top body fabric has UPF 50+, and a shelf bra with removable cups. Perfect for the teen or tween who wants to swim, dive, or hangout by the beach in full comfort!
MIX & MATCH, SAVE 10%: Purchase a swim top and bottom together and save 10% at checkout.
Pull on style and coverage with our new Racerback Tankini Top. The Tankini Top body fabric has UPF 50+, and a shelf bra with removable cups. Perfect for the teen or tween who wants to swim, dive, or hangout by the beach in full comfort!
MIX & MATCH, SAVE 10%: Purchase a swim top and bottom together and save 10% at checkout.
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
Eligible for a return or exchange within 30 days of delivery and with original sanitary strip and tags attached.
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.
When you purchase a swim top and bottom together, you’ll automatically save 10% at checkout.
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.
All items purchased as part of the Kt Vault Sale are final sale, meaning no returns, exchanges or refunds can be accommodated. For non-sale items our standard return policy applies.
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.