Period Swim Twist High Rise Bikini Bottom

The main character on light days, and reliable backup on heavy days. It’s built with a super-absorbent gusset that absorbs period blood without swelling in the water. How? Oh, just our famous 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. 

 

Other Features:

- High rise with twist-front waistband

- Bum coverage: Medium

- Super-discreet liner

- 50+ UPF protection

- Pair with matching Double Scoop Bikini Top

 

MIX & MATCH, SAVE 10%: Purchase a swim top and bottom together and save 10% at checkout.

Swim, splash, or sunbathe without ever having to struggle with tampons.
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Absorbs up to 1-3 regular tampons worth of period blood.
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Rapidly absorbs moisture to keep you fresh and dry.
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Thin, subtle, and designed to feel just like regular swimwear.
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Simply machine wash on cold and lay flat to dry.

The main character on light days, and reliable backup on heavy days. It’s built with a super-absorbent gusset that absorbs period blood without swelling in the water. How? Oh, just our famous 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. 

 

Other Features:

- High rise with twist-front waistband

- Bum coverage: Medium

- Super-discreet liner

- 50+ UPF protection

- 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, 15% Spandex

Lining: 85% Nylon, 15% Spandex

Gusset: Fresh Fix Technology®, Polyurethane 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.

 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
FOR THIS GENERATION
FOR THE PLANET
FOR REAL LIFE
nothing is TMI here—we promise.
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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.

 COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
COMFORTABLE
ABSORBENT
JUST PLAIN BETTER
REUSABLE
Reviews
Write a Review
average rating 4.6 out of 5
Based on 66 reviews
  • 5 Stars
    55 Reviews
  • 4 Stars
    3 Reviews
  • 3 Stars
    3 Reviews
  • 2 Stars
    2 Reviews
  • 1 Star
    3 Reviews
88% of reviewers would recommend this product to a friend
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
66 Reviews
Reviewed by Kristin C.
Verified Buyer
I recommend this product
Band Size
32"
Pant Size
Teen 18-20
Size Purchased
M
Usage
  • Pool
Rated 5 out of 5
Review posted

Peace of mind

We have been worried about warmer weather with the first summer coming since my daughter started her period. She loves these undies and she was so relieved we found these for water activities.

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Quality
Rated 5 out of 5
Comfort
Rated 4 out of 5
Effectiveness
Rated 5 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
Was this helpful?
Reviewed by ChyAnne H.
Verified Buyer
I recommend this product
Band Size
28"
Pant Size
Teen 4-10
Size Purchased
M
Usage
  • Pool
Rated 5 out of 5
Review posted

Great swim bottoms

Perfect for my 12 year old for spring break!

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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
Was this helpful?
Reviewed by Karyn W.
Verified Buyer
I recommend this product
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Teen 4-10
Size Purchased
M
Band Size
N/A
Rated 5 out of 5
Review posted

Worked great

My teen liked the swim bottoms and felt comfortable not to worry about leaks

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Quality
Rated 5 out of 5
Comfort
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
Effectiveness
Rated 5 out of 5
Was this helpful?
Reviewed by Maude T.
Verified Buyer
I recommend this product
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Teen 4-10
Size Purchased
S
Band Size
32"
Usage
  • Period
Rated 5 out of 5
Review posted

Great fit

Great fit

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Quality
Rated 5 out of 5
Comfort
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
Effectiveness
Rated 5 out of 5
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Reviewed by Danielle V.
Verified Buyer
I recommend this product
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Pant Size
Kids 12-14
Size Purchased
S
Band Size
N/A
Usage
  • Period
Rated 5 out of 5
Review posted

Great fit

Great fit, stylish and comfortable

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Quality
Rated 5 out of 5
Comfort
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
Effectiveness
Rated 5 out of 5
Was this helpful?