My daughter loved it!
Great fit! My daughter used this bathing suit for her lifeguard training. It was wonderful that she didn’t have to miss a lesson because of her period!
The one-piece that keeps selling out! Perfect for all swimmers, it can be worn alone on light days, or with a tampon or menstrual cup on heavy days, and won’t leak whether you’re in or out of the water. Designed with three layers to keep you cool, calm, and protected:
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.
Other Features:
- Fully lined
- Open racerback for better mobility
- Removable cups
- Bum coverage: Medium
- Super-discreet liner
- 50+ UPF protection
The one-piece that keeps selling out! Perfect for all swimmers, it can be worn alone on light days, or with a tampon or menstrual cup on heavy days, and won’t leak whether you’re in or out of the water. Designed with three layers to keep you cool, calm, and protected:
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.
Other Features:
- Fully lined
- Open racerback for better mobility
- Removable cups
- Bum coverage: Medium
- Super-discreet liner
- 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
Gusset: Fresh Fix Technology®, Polyurethane Film
Additional Product Ingredient Information
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.
Quality |
Rated 4 out of 5
|
Comfort |
Rated 4 out of 5
|
Effectiveness |
Rated 4 out of 5
|
Sizing |
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to Size and 2 is Fits Large
|
Great fit! My daughter used this bathing suit for her lifeguard training. It was wonderful that she didn’t have to miss a lesson because of her period!
I bought this swimsuit for my 12 y.o. who loves her swimming classes. The quality of this product is just amazing! The first thing I noticed was the very soft, almost silky feeling of the fabric. Then, and most importantly, it allowed my girl to attend her classes with full confidence as it's very absorbing despite looking and feeling like a regular swimsuit. We're definitely buying again (this time for mom and daughter). International shipping was very fast, too.
Quality |
Rated 5 out of 5
|
---|---|
Comfort |
Rated 5 out of 5
|
Effectiveness |
Rated 5 out of 5
|
Sizing |
Rated 0 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to Size and 2 is Fits Large
|
Fits well, good quality
Got this for my granddaughter and she loves it. No more leaks when swimming on her period. YAY!!
Love that this suit allows for uninterrupted swim during the period week. Would highly recommend sizing down for competitive swimmers!
Quality |
Rated 4 out of 5
|
---|---|
Comfort |
Rated 4 out of 5
|
Effectiveness |
Rated 4 out of 5
|
Sizing |
Rated 1 on a scale of minus 2 to 2, where minus 2 is Fits Small, 0 is True to Size and 2 is Fits Large
|
KT Size | Hips | Kids Pant Size | Adult Pant Size |
---|---|---|---|
XXS | 25” - 27” | 7 | --- |
XS | 28” - 30” | 8 - 10 | --- |
S | 31” - 34” | 12 - 14 | 00 - 2 |
M | 35” - 38” | 16 - 20 | 4 - 8 |
L | 39” - 42” | --- | 10 - 14 |
XL | 43” - 46” | --- | 16 - 18 |
XXL | 47” - 50” | --- | 20 - 22 |
1. Hips
Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.Still Not Sure What Size To Get?
KT Size | Band | Hips | Kids Pant Size | Adult Pant Size |
---|---|---|---|---|
XXS | 23 3/4" - 25 1/4" | 25” - 27” | 7 | --- |
XS | 25 1/4" - 26 3/4" | 28” - 30” | 8 - 10 | --- |
S | 26 3/4" - 28 1/4" | 31" - 34" | 12 - 14 | 00 - 2 |
M | 28 1/4" - 29 3/4" | 35” - 38" | 16 - 20 | 4 - 8 |
L | 29 3/4" - 31 1/2" | 39” - 42” | --- | 10 - 14 |
XL | 31 1/2" - 33 1/2" | 43” - 46” | --- | 16 - 18 |
XXL | 33 1/2" - 35 1/2" | 47” - 50” | --- | 20 - 22 |
1. Band
First, measure around the torso right below the breast
2. Hips
Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.
Still Not Sure What Size To Get?
KT Size | Hips | Kids Pant Size | Adult Pant Size |
---|---|---|---|
XXS | 25” - 27” | 7 | --- |
XS | 28” - 30” | 8 - 10 | --- |
S | 31” - 34” | 12 - 14 | 00 - 2 |
M | 35” - 38” | 16 - 20 | 4 - 8 |
L | 39” - 42” | --- | 10 - 14 |
XL | 43” - 46” | --- | 16 - 18 |
XXL | 47” - 50” | --- | 20 - 22 |
1. Hips
Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.
Still Not Sure What Size To Get?
KT Size | Band | Hips |
---|---|---|
XS | 28" | 25” - 27” |
S | 30" | 28” - 30” |
M | 32" | 31” - 35” |
L | 34" | 36” - 40” |
XL | 36" | 41” - 44” |
XXL | 38" | 45” - 48” |
1. Band
First, measure around the torso right below the breast
2. Hips
KT Leotards are designed to sit on the hips, so measure around the widest part of the hips and refer to the chart above to find the best fit.
Still Not Sure What Size To Get?
Size | Bust | Hips |
---|---|---|
XS | 27” | 25" - 27" |
S | 30” | 28" - 30" |
M | 34" | 31" - 35" |
L | 37” | 36" - 40" |
XL | 40” | 41" - 44" |
XXL | 40” | 45" - 48" |
Still Not Sure What Size To Get?
Size | Hips | Height | Weight |
---|---|---|---|
XS/S | 25" - 30" | 4'2" - 5'1" | 65 - 100 lbs |
M/L | 31" - 40" | 4'9" - 5'6" | 105 - 130 lbs | XL/XXL | 41" - 48" | 4'11" - 5'6" | 135 - 170 lbs |
Still Not Sure What Size To Get?
KT Size | Hips | Kids Pant Size | Adult Pant Size |
---|---|---|---|
XXS | 25” - 27” | 7 | --- |
XS | 28” - 30” | 8 - 10 | --- |
S | 31” - 34” | 12 - 14 | 00 - 2 |
M | 35” - 38” | 16 - 20 | 4 - 8 |
L | 39” - 42” | --- | 10 - 14 |
XL | 43” - 46” | --- | 16 - 18 |
XXL | 47” - 50” | --- | 20 - 22 |
1. Hips
Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.Still Not Sure What Size To Get?