Period Swim Short

Our most-requested swim style ever! Perfect for teens who want fuller coverage in the front and back—while being fully protected on their period. Wear it alone on light days, or with a tampon or menstrual cup on heavy days.

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 about the same as 2-3 super tampons worth of period blood.

Layer 3: A waterproof outer layer prevents swelling.

Other Features:

- Bum coverage: Max

- Wide waistband for comfort

- Mesh interior lining

- Super discreet liner

- 50+ UPF protection

- Pair with matching Double Scoop Bikini Top

Finally! Max-coverage, period swim shorts that have your back.
Image of a absorbancy surrounding text
Absorbs about the same as 2-3 super tampons worth of period blood.
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Rapidly absorbs moisture to keep you fresh and dry.
Image of a light and comfy surrounding text
Thin, subtle, and designed to feel just like regular swimwear.
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Simply machine wash cold and lay flat to dry.

Our most-requested swim style ever! Perfect for teens who want fuller coverage in the front and back—while being fully protected on their period. Wear it alone on light days, or with a tampon or menstrual cup on heavy days.

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 about the same as 2-3 super tampons worth of period blood.

Layer 3: A waterproof outer layer prevents swelling.

Other Features:

- Bum coverage: Max

- Wide waistband for comfort

- Mesh interior lining

- Super discreet liner

- 50+ UPF protection

- Pair with matching Double Scoop Bikini Top

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. 

For items with a 20% or more discount, you may exchange for another item or return for store credit. No refunds can be accommodated. 

Items marked as “Flash Sale” or “Clearance” are final sale, meaning no returns, exchanges or refunds can be accommodated. No exceptions. 

Please note: Sale items are not eligible for our First Pair Risk-Free Policy.

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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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
average rating 4.3 out of 5
Based on 251 reviews
  • 5 Stars
    165 Reviews
  • 4 Stars
    44 Reviews
  • 3 Stars
    16 Reviews
  • 2 Stars
    9 Reviews
  • 1 Star
    17 Reviews
85% 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
Write a Review
Review posted
Reviewed by ROSE R.
Verified Buyer
Period Swim Short
Reviewing
Period Swim Short
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Current Band Size
28
Pant Size
Kids 12-14
Size Purchased
S
Usage
  • Swim Class
Rated 5 out of 5

My daughter likes them

They seem to work pretty well and allow her to keep swimming even during her eriod, she finds them comfortable,

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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
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Review posted
Reviewed by Rebecca S.
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Period Swim Short
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Period Swim Short
Rated 5 out of 5

The shorts fit

My daughter said these fit nicely and are comfortable

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Reviewed by Sheena F.
Verified Buyer
Period Swim Short
Reviewing
Period Swim Short
Rated 5 out of 5

Good fit for my tween

My daughter isn’t quite ready for other period products so this was the perfect solution for summer. They fit well and she seems comfortable. I’m glad this product is out there.

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Reviewed by Lisa
Period Swim Short
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Period Swim Short
Rated 5 out of 5

5 Stars

Good quality

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Reviewed by Stefanie S.
Verified Buyer
Period Swim Short
Reviewing
Period Swim Short
Rated 5 out of 5

Great product!

We recently exchanged the twist high waist bottoms for these shorts and they are really great quality, comfortable, and they fit my 11 year old daughter really well! I love that Knix makes sizes for younger girls because a lot of the period swim wear out there is made for teenage girls or adults. I also love that they have the swim shorts option because sometimes the other bottom styles can be too revealing. Love these!

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