Your Bag

Your cart is empty

But you're full of potential..
Rewards Members Earn 0 Points

Suggestions

Top Picks

Revolution V-Neck Bra

$68.00 CAD
10% off Bra & Underwear Sets*

Color: Warm Sand

Super Leakproof® Dream Boxer

$48.00 CAD

Color: Plaid Limited Edition

The Quintessential Sleep Set

$150.00 CAD

Color: Ivory Limited Edition

Leakproof UltraThin No-Show High Rise

$32.00 CAD
Mix & Match: 3+ for $25 each

Color: Black

Home / Bras / Catalyst Sports Bra

Catalyst Sports Bra

$85.00 CAD

10% off Bra & Underwear Sets*
Checkmark

Our most supportive sports bra

Checkmark

Eliminates bounce by 76%

Checkmark

Ventilation for increased airflow

Checkmark

Full coverage design

Adiya is a 36C and wears a Knix size L | White

Adiya is a 36C and wears a Knix size L

| White
Adiya is a 36C and wears a Knix size L | White

Adiya is a 36C and wears a Knix size L

| General
| White
Adiya is a 36C and wears a Knix size L | White

Adiya is a 36C and wears a Knix size L

Adiya is a 36C and wears a Knix size L | White

Adiya is a 36C and wears a Knix size L

| General

Adiya is a 36C and wears a Knix size L

Color: White

Size:

True to Size

•

Size:

Size and Fit Guide

Free Shipping on orders $100+

Shipping

Shipping

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.
Easy Returns within 30 Days

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.
Rewards Members Earn 85 Points

"It’s the only sports bra for bigger boobs I've tried that keeps bounce to a minimum when running."

- SELF

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.

Zoom

Adiya is a 36C and wears a Knix size L | White
| White
Adiya is a 36C and wears a Knix size L | White
| General
| White
Adiya is a 36C and wears a Knix size L | White
Adiya is a 36C and wears a Knix size L | White
| General

How to Choose?

Essential

Drop
Drop
Drop
Drop
Drop
  • • Everyday Wear
  • • No leakproof protection
  • tsp
    0 tsp

Heavy

Drop
Drop
Drop
Drop
Drop
  • • heavy period days
  • • overnight protection
  • • light bladder leaks
  • 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
  • • light period days
  • • sweat
  • • discharge
  • 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
  • • moderate period days
  • • light bladder leaks
  • • sweat
  • 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
  • • extra heavy period days
  • • overnight protection
  • • light bladder leaks
  • 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
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 Bras

Shop All Arrow Right

Revolution V-Neck Bra

$68.00 CAD
10% off Bra & Underwear Sets*

Color: Black

Revolution Scoop Bra

$68.00 CAD
10% off Bra & Underwear Sets*

Color: Cheetah Print Limited Edition

WingWoman Contour Bra

$75.00 CAD
10% off Bra & Underwear Sets*

Color: Black

The One&Only Scoop Bra®

$65.00 CAD
10% off Bra & Underwear Sets*

Color: Warm Sand

FreeFlex™ Demi Bra

$78.00 CAD
10% off Bra & Underwear Sets*

Color: Warm Sand

Revolution Adjustable Pullover Bra

$65.00 CAD
10% off Bra & Underwear Sets*

Color: White

Revolution Shadow Mesh Bra

$68.00 CAD
10% off Bra & Underwear Sets*

Color: Warm Sand

Catalyst Sports Bra

$85.00 CAD
10% off Bra & Underwear Sets*

Color: White

4.5
Rated 4.5 out of 5 stars
Based on 5,201 reviews
Total 5 star reviews: 3.8k Total 4 star reviews: 786 Total 3 star reviews: 266 Total 2 star reviews: 168 Total 1 star reviews: 225
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)
5,201 reviews
  • Rated 5 out of 5 stars
    3 minutes 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 1 out of 5 stars
    Yesterday
    it is not a good material

    strap hook broke already in a week.

    Bijal M.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 days ago
    5 Stars

    Toujours parfaite

    François
    Was this helpful?
  • Rated 5 out of 5 stars
    3 days ago
    5 Stars

    Toujours parfaite

    François
    Was this helpful?
  • Rated 1 out of 5 stars
    1 week ago
    Short Straps

    it feels good, but the straps are fully open and it feels too tight.. Returning

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

    Amazing fit, comfort, and support! Highly recommend.

    Nadeen A.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    5 Stars

    Knix is the best.

    Patricia
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Every Day Perfection

    Great for bigger busts.

    This is my go to bra. I love the fit and versatility.

    I have one in every colour!

    Donna T.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Catalyst

    Awesome!

    Geetha M.
    Verified Buyer
    Was this helpful?
  • Rated 2 out of 5 stars
    1 week ago
    2 Stars

    Its a weird shape. Not same as the previous catalyst bras. Theyve changed something and its not fitting the same way :(

    Samana
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    Great quality bras!

    Donna
    Was this helpful?
  • Rated 5 out of 5 stars
    3 weeks ago
    Comfortable breathable support

    I love this sports bra. It gives good coverage and support, is very comfortable, is warm enough when cross country skiing, yet breathable.

    Elizabeth M.
    Verified Buyer
    Was this helpful?