Period Swim Short - Long

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, with a tampon or menstrual cup on heavy days or whatever works for your flow.

Other Features:
- Bum coverage: Max
- Wide waistband for comfort
- Mesh interior lining
- Super discreet liner

Pair with matching Double Scoop Bikini Top

 

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

Go the distance with these max-coverage, extra-long swim shorts
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Absorbs about 2 super tampons worth of period blood
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Period Swim bottoms are designed to feel just like regular swimwear
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Machine wash on 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, with a tampon or menstrual cup on heavy days or whatever works for your flow.

Other Features:
- Bum coverage: Max
- Wide waistband for comfort
- Mesh interior lining
- Super discreet liner

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.

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nothing is TMI here—we promise.
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Exclusions apply. Offer valid from Wednesday, May 8th 9:00am to Monday, May 13 at 11:59pm EST. Applies only to in-stock items and cannot be extended after the listed date. No price adjustments for previous orders. Cannot be combined with any other discount offers. No rain checks.  Contact your local store for collection availability. 

For items with a 20% or more discount you may exchange for another item or store credit within 30 days of delivery. No refunds.

Knix store locations include: Toronto Queen St, Sherway Gardens, Toronto Premium Outlet, Ottawa Westboro, Ottawa Rideau Centre, Vancouver - West 4th, Vancouver - Robson,  Calgary Mission, Calgary Market Mall, Winnipeg Polo Park, Edmonton Southgate, Richmond Centre

Free Shipping available on orders over $80+ CAD before tax and after discounts and applies to shipping addresses within Canada.

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 5.0 out of 5
Based on 3 reviews
  • 5 Stars
    3 Reviews
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100% of reviewers would recommend this product to a friend
Quality
Rated 5 out of 5
Comfort
Rated 5 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 Daniela L.
Verified Buyer
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Band Size
28"
Pant Size
Kids 16-20
Size Purchased
S
Usage
  • Pool
Rated 5 out of 5

Excellent fit

Great product, fit well, pockets are great

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I recommend this product
Quality
Rated 5 out of 5
Comfort
Rated 5 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
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Review posted
Reviewed by Melanie M.
Verified Buyer
I'm a...
Parental Figure
I purchased for...
A Teenager/Tween
Band Size
N/A
Pant Size
Teen 12-16
Size Purchased
L
Usage
  • Pool
  • Swim Class
Rated 5 out of 5

Swim bottoms

A good fit and nice choice for swim bottoms

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I recommend this product
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 J. P.
Verified Buyer
Rated 5 out of 5

Great option for petite tween

My small 12yo loves these. She wears them under unlined board shorts for extra confidence.

She likes that they aren't bulky.

We're unsure how they will stack up on heavy flow days if she has to get in and out of the pool repeatedly, but they fit well and are comfortable for mid flow days.

They also easily hang dry overnight in our laundry room, so they're ready to use the next day.

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