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| Warm Sand
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Color: Warm Sand

Color: Warm Sand

Size:

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Home / Sports 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
| Blue Light
| Blue Light
| General

Color: Blue Light Limited Edition

Size:

True to Size

•

Size:

Size and Fit Guide

Free Shipping on orders $100+

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Processing Timelines

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.

Delivery Time

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.

Shipping Charges

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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Returns

Returns

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

Product Description

You’re in control of your performance in our most supportive sports bra ever. Made with encapsulated cups for maximum support and a locked-in feel, this bra reduces overall breast movement. Ventilation in the front helps you stay cool throughout your workout. And the traditional adjustable hook-and-eye back closure with five rows lets you easily find the perfect fit.

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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| Blue Light
| General
| Blue Light
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| General

How to Choose?

Essential

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

Heavy

  • • 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

  • • 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

  • • 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

  • • 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

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Catalyst Sports Bra

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Momenta Racerback Sports Bra

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CloudCut™ Bomber

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Pursuit Training Jacket

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4.5
Rated 4.5 out of 5 stars
Based on 5,235 reviews
Total 5 star reviews: 3.8k Total 4 star reviews: 789 Total 3 star reviews: 270 Total 2 star reviews: 173 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)
5,235 reviews
  • Rated 5 out of 5 stars
    4 minutes ago
    Bra trview

    I love this bra. No underwire but holding tho g up really well!

    Nicole B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    Yesterday
    A perfect fit

    I have been wearing sports bras with an underwire for a very long time because I need the support for the gym and an active life. I will never go back after trying the catalyst bra. It's as supportive as the underwire bra but is so much more comfortable! I used the sizing table and the fit is good. I have just ordered two more in different colours.

    Marilyn F.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 days ago
    5 Stars

    Comfy, supportive, love the colour

    Janet
    Was this helpful?
  • Rated 5 out of 5 stars
    4 days ago
    Love this bra ❤️

    While in Calgary recently I purchased two of this bra . The fit and colours available are amazing and the assistance at the Market Mall store was greatly appreciated. I have seen Knix online but was unsure of purchasing without trying on. The size indicator on the site matches perfectly with the size tried on. I purchased XL++ for 38F and fit is beautiful . Two of these coming home w me along with a jogger and tshirt. I will definitely be ordering more as we do not have a store front near by.

    Trish
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    Catalyst sports bra

    I love it. I am a full figured woman and this bra keeps me in and it’s comfortable. It’s fairly new so I hope it lasts but first impression is excellent. I highly recommend it.

    Donna R.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    5 Stars

    I liked the style Its a bit small for the sizing but still fits

    Marla
    Was this helpful?
  • Rated 5 out of 5 stars
    6 days ago
    4 YEARS

    I ordered this bra in May 2022, and in the last 6 months it’s started falling apart, BUT to have a bra for four years AND I go to the gym 3x a week every week… there is no bra like this one, I swear. So solid, so supportive, and again FOUR years of wear and tear and a lot of running, biking, and weightlifting. To top it all off, I’m a 34H so it’s not like it’s a lil bit of boob having to be held in place. I’m ordering a new one, and hope it lasts another 4 years.

    Rachel
    Verified Reviewer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    This is the best wireless sports bra!

    This is the only wireless sports bra that stands up to my rebounding morning routine. I have jumped on without it, only to quickly be reminded why it is a must! I am a natural 34G and the girls NEED support!! I had purchased the catalyst years ago, but stopped wearing it because the straps were constantly coming undone in the gym at the worst times. I am so glad I thought to give it another try. That design flaw has been completely fixed and the straps are now adjustable but fixed securely- no chance of flying off mid-rep!

    Melissa L.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Support with comfort!

    The material is so light. Breathable. The fit is so comfy. I am going to get my everyday bras from Knix!

    Elizabeth S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Best bra ever

    I buy no other. Fit, comfort and look are for me.

    Cheryl R.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Great!

    Fits true to size. Seemed very tight at first but then loosens up

    Kim S.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 weeks ago
    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?

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