Teen Period Swimwear

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 Cute, comfortable, leakproof swimsuits to take on swim laps or beach day.

  • Black
Period Swim Sport One-Piece
Light Absorbency
$70.55 USD $83 USD 15% OFF
  • Black
Period Swim Bikini Bottom
Light Absorbency
$34 USD $40 USD 15-60% OFF
  • Black
Period Swim Short
Light Absorbency
$42.50 USD $50 USD 15-60% OFF
  • Black
Period Swim Full-Coverage Bikini Bottom
Light Absorbency
$34 USD $40 USD 15-60% OFF
  • Black
Double Scoop Bikini Top
$38.25 USD $45 USD 15% OFF
  • Black
Teen Period Swim Board Shorts
Light Absorbency
$38.25 USD $45 USD 15-60% OFF
  • Black
Period Swim Freestyle One-Piece
Light Absorbency
$33 USD $83 USD 60% OFF
  • Tropical Punch
Period Swim Short - Long
Light Absorbency
$20 USD $50 USD 60% OFF
  • Black
Period Swim Twist High Rise Bikini Bottom
Light Absorbency
$38.25 USD $45 USD 15-60% OFF
  • Black
Period Swim Twist High Rise Bikini Bottom
Light Absorbency
$38.25 USD $45 USD 15-60% OFF
  • Black
Period Swim Short
Light Absorbency
$42.50 USD $50 USD 15-60% OFF
Swim Essentials Period Kit
Light - Heavy Absorbency
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$164.90 USD $194 USD Save 15%
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.