Period Swim Short - Long
You asked for longer lengths, and we delivered! Period Swim Short now available in a 5 ½ “ inseam length! The result? Your teen gets the period protection they need with the trending look they want.
Pair with matching Double Scoop Bikini Top
MIX & MATCH, SAVE 10%: Purchase a swim top and bottom together and save 10% at checkout.
You asked for longer lengths, and we delivered! Period Swim Short now available in a 5 ½ “ inseam length! The result? Your teen gets the period protection they need with the trending look they want.
Pair with matching Double Scoop Bikini Top
MIX & MATCH, SAVE 10%: Purchase a swim top and bottom together and save 10% at checkout.
Body: 85% Nylon, 5% Spandex
Interior Mesh: 86% Nylon, 14%Spandex
Fresh Fix Technology® Gusset: 85% Nylon, 15% Spandex; 93% Polyester, 7% Spandex; 87% Polyester, 13% Spandex; 100% PU Film
Machine wash cold and lay flat to dry. Do not bleach, iron, or dry clean.
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 $80.
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.
Canadian Orders: Please allow 2–4 business days for shipping to the GTA, 3–10 business days for urban areas, and 6–15 business days for remote locations.
NOTE: Orders placed on Friday after 1 PM will not be processed until the following Monday.
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.
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.