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Home / Bras / Catalyst Sports Bra

Catalyst Sports Bra

$85.00 CAD

10% off Bra & Underwear Sets*
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Our most supportive sports bra

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Eliminates bounce by 76%

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Ventilation for increased airflow

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Full coverage design

| Blue Light
| Blue Light
| Blue Light
| General
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| General

Color: Blue Light Limited Edition

Size:

True to Size

•

Size:

Size and Fit Guide

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Please allow 1-2 business days for our warehouse team to pack and ship your order. During peak periods such as sales, holidays and product launches, please allow up to 4 business days for us to process your order.

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For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines vary depending on location and do not include processing times.

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Orders over $100* CAD = Free Shipping (2-6 business days)

Orders under $100* CAD = $12 CAD Shipping (1-3 business days)

Orders delivering to NWT, Nunavut and Yukon are subject to $20 delivery fee.

*After discounts, before shipping and taxes.
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Sale & Last Call

Items discounted 30% and below are eligible for size exchange or store credit. Items discounted above 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.

Free Returns

Knix covers the return shipping fees for exchanges and refunds initiated through our Return & Exchange Portal. Exchange orders initiated through our Return & Exchange portal are also eligible for free shipping within the USA and Canada. Please note, the shipping fees on your original order are non-refundable.

Return Policy

Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.
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"It’s the only sports bra for bigger boobs I've tried that keeps bounce to a minimum when running."

- SELF Magazine

High Impact Support

You are in control of your performance with our most supportive, full-coverage sports bra.

Feels Made For You

The traditional adjustable hook and eye back closure, featuring five rows, allows you to find the perfect fit easily.

Functional Style

The breathable, moisture-wicking fabric and ventilation in the front help you stay cool throughout your workout. Made with encapsulated cups for maximum support and a locked-in feel, this bra reduces overall breast movement by 76%*.

*During treadmill running; based on the University of Portsmouth Research Group in Breast Health study, 2018.

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| General
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How to Choose?

Essential

Drop
Drop
Drop
Drop
Drop
  • • Days you don’t need leak protection. Everyday freshness and moisture wicking.
  • tsp
    0 tsp

Heavy

Drop
Drop
Drop
Drop
Drop
  • • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
  • tsp
    about 8-14 tsp
  • pad
    about 1.5-3 regular pads
  • tampon
    about 4-7 super tampons
  • cup
    about 1.5-3 menstrual cups

Light

Drop
Drop
Drop
Drop
Drop
  • • Daily freshness. For sweat, discharge, period spotting, or backup protection.
  • tsp
    about 1-3 tsp
  • pad
    about 1-3 pantyliners
  • tampon
    about 1-3 regular tampons
  • cup
    about 0.5 menstrual cups

Moderate

Drop
Drop
Drop
Drop
Drop
  • • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
  • tsp
    about 4-8 tsp
  • pad
    about 1-1.5 regular pads
  • tampon
    about 2-4 super tampons
  • cup
    about 0.5-3 menstrual cups

Ultra

Drop
Drop
Drop
Drop
Drop
  • • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
  • tsp
    about 15-20 tsp
  • pad
    about 1.5-2.5 super pads
  • tampon
    about 7-11 super tampons
  • cup
    about 2-3 menstrual cups

Sports Bras Comparison Chart

Catalyst Sports Bra
Maximum support

Maximum support

Full coverage

Full coverage

Reduces bounce by 76%

Reduces bounce by 76%

Catalyst Front Zip Sports Bra
Maximum support

Maximum support

Full coverage

Full coverage

Easy on and off front zip

Easy on and off front zip

Momenta Racerback Sports Bra
Medium support

Medium support

Mesh underband for ventilation

Mesh underband for ventilation

Pullover style

Pullover style

Engage Medium Impact Sports Bra
Medium support

Medium support

Sewn-in cups

Sewn-in cups

Hook-and-eye back closure

Hook-and-eye back closure

Longevity Sports Bra
Light support

Light support

Bra top with bonded-in cups

Bra top with bonded-in cups

Pullover style

Pullover style

HIGH IMPACT SPORTS BRA

Elevate your performance. Engineered for movement.

The encapsulated cups provide maximum support for a locked-in feel that reduces overall breast movement by 76%*.

High Impact Bra

High Impact Support

Combines breast encapsulation and compression for maximum impact support.

Our Best-Selling Active

Shop All Arrow Right

Catalyst Sports Bra

$85.00 CAD
10% off Bra & Underwear Sets*

Color: Blue Light Limited Edition

HiTouch™️ High Rise Legging

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Color: Twilight Navy Limited Edition

Momenta Racerback Sports Bra

$68.00 CAD
10% off Bra & Underwear Sets*

Color: Bright White Limited Edition

Longevity Sports Bra

$68.00 CAD
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Color: Dahlia Limited Edition

CloudCut™ Bomber

$118.00 CAD

Color: Dahlia Limited Edition

CloudCut™ Jogger

$95.00 CAD

Color: Twilight Navy Limited Edition

HiTouch™️ Active Contour Tank

$68.00 CAD

Color: White

Pursuit Training Jacket

$125.00 CAD

Color: Twilight Navy Limited Edition

4.5
Rated 4.5 out of 5 stars
Based on 5,219 reviews
Total 5 star reviews: 3.8k Total 4 star reviews: 789 Total 3 star reviews: 268 Total 2 star reviews: 170 Total 1 star reviews: 227
90%would recommend these products
ComfortRated 4.5 on a scale of 1 to 5
FitRated -0.3 on a scale of minus 2 to 2
SupportRated 4.6 on a scale of 1 to 5
Write a Review (Opens in a new window)
5,219 reviews
  • Rated 5 out of 5 stars
    Yesterday
    My favourite bra to golf in

    Love this bra. It is the only bra I wear to golf in. Just wish they would get my sizing back in stock so I could order more. Been sold out for a while.

    Sheila C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    Supportive

    very supportive and comfortable

    Sara S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    Wide straps, supportive comfort

    I really like these bras. I now own 5. One of my favorite features is the wide shoulders straps that offer better comfort than a lot of sports bra without the wide straps. It took me a couple orders and returns before I got the size right. These bras are supportive and comfortable during yoga, exercise classes, walking, the gym. They do not dig into my skin like other sports bras. They were out of stock for a while so when they had them available again, I ordered several. Love these bras.

    Susan U.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Very supportive

    I have a very large bust (34DDD) and I have always struggled with "high impact" sports bras. I read reviews saying this was legitimately high impact, but I had to try it out. I am happy to say that it does hold well during high impact activities like HIIT training and running! It is nice to have found something that fits well and doesn't hurt my shoulders to wear. I did order a M+, but had to return and get an M++ because it was too small so I recommend sizing up if you are on the cusp of a size.

    Mandi M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Best bra!

    This is the perfect bra for bigger bust women! My go to for the gym

    Carol O.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Great Support

    Great support and very comfortable

    Sara S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Love

    This sports bra is supportive and super comfortable . I love it!

    Jennifer C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Great support

    For the more fuller figured woman they definitely hold everything in place. Comfortable too.

    Maria B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 weeks ago
    Catalyst Sports Bra

    Fit great and it is comfortable.

    Kathy C.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    4 weeks ago
    Love the catalyst

    I have been a faithful customer of the Catalyst. I have abundant breast and sensitive skin. I am very active all throught the day. I never know if I will need full support all of the sudden. I love being able to wear it all day without having sensitive skin and I love being able to run or jump anytime.

    Sarah P.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Toujours parfaite

    François
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    5 Stars

    Toujours parfaite

    François
    Was this helpful?

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