Your Bag

Your cart is empty

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

Suggestions

Top Picks

Revolution V-Neck Bra

$65.00 USD
10% off Bra & Underwear Sets*

Color: Warm Sand

Super Leakproof® Dream Boxer

$48.00 USD

Color: Plaid Limited Edition

Leakproof UltraThin No-Show High Rise

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

Color: Warm Sand

WingWoman Contour Bra

$68.00 USD
10% off Bra & Underwear Sets*

Color: Black

Home / Bras / Catalyst Front Zip Sports Bra

Catalyst Front Zip Sports Bra

$85.00 USD

10% off Bra & Underwear Sets*
Checkmark

Our most supportive sports bra

Checkmark

Ventilation for increased airflow

Checkmark

Full coverage fit

Checkmark

Easy on and off front zip

Sarah is a 34DD and wears a Knix size 6+ | Black

Sarah is a 34DD and wears a Knix size 6+

| Black
Sarah is a 34DD and wears a Knix size 6+ | Black

Sarah is a 34DD and wears a Knix size 6+

Sarah is a 34DD and wears a Knix size 6+ | Black

Sarah is a 34DD and wears a Knix size 6+

| General
Easy front zip closure | General

Easy front zip closure

Adjustable back closure and cross straps | General

Adjustable back closure and cross straps

Sarah is a 34DD and wears a Knix size 6+

Color: Black

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. Once an order is placed, we cannot guarantee any address updates, order changes or cancellations. Orders placed on Friday after 1PM will not be shipped until the following Monday.


Split Shipments

Most orders will ship from a single warehouse. However, we occasionally ship from a combination of warehouse locations, so you may receive your order in multiple parts. If items from your order ship in separate packages, we’ll send you tracking information for each package when it becomes available.

Delivery Timelines

For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines do not include processing times. See above for details. All transit times are measured in business days which are Monday-Friday, excluding holidays.

Please note, all shipping timelines are estimates and are not guaranteed.

We are not able to ship to US territories (including Puerto Rico, U.S. Virgin Islands, Guam, Northern Mariana Islands and American Samoa) at this time.
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

"Most supportive sports bra."

- Good Housekeeping

High Impact Support

You are in control of your performance with our most supportive, full-coverage sports bra. Made with encapsulated cups for maximum support and locked in feel.

Feels Made For You

The traditional adjustable hook and eye back closure, featuring five rows, allows you to find the perfect fit easily. Easy front zip closure. Ventilation in the front helps you stay cool throughout your workout.

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.

Zoom

Sarah is a 34DD and wears a Knix size 6+ | Black
| Black
Sarah is a 34DD and wears a Knix size 6+ | Black
Sarah is a 34DD and wears a Knix size 6+ | Black
| General
Easy front zip closure | General
Adjustable back closure and cross straps | 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

Our Best-Selling Bras

Shop All Arrow Right

Revolution V-Neck Bra

$65.00 USD
10% off Bra & Underwear Sets*

Color: Warm Sand

WingWoman Contour Bra

$68.00 USD
10% off Bra & Underwear Sets*

Color: Black

Revolution Scoop Bra

$65.00 USD
10% off Bra & Underwear Sets*

Color: Cheetah Print Limited Edition

The One&Only Scoop Bra®

$58.00 USD
10% off Bra & Underwear Sets*

Color: Warm Sand

FreeFlex™ Demi Bra

$68.00 USD
10% off Bra & Underwear Sets*

Color: Black

Revolution Adjustable Pullover Bra

$65.00 USD
10% off Bra & Underwear Sets*

Color: White

Revolution Shadow Mesh Bra

$65.00 USD
10% off Bra & Underwear Sets*

Color: Black

Catalyst Sports Bra

$78.00 USD
10% off Bra & Underwear Sets*

Color: Black

4.2
Rated 4.2 out of 5 stars
Based on 3,062 reviews
Total 5 star reviews: 1.9k Total 4 star reviews: 516 Total 3 star reviews: 260 Total 2 star reviews: 163 Total 1 star reviews: 215
84%would recommend this product
ComfortRated 4.3 on a scale of 1 to 5
FitRated -0.1 on a scale of minus 2 to 2
SupportRated 4.5 on a scale of 1 to 5
Write a Review (Opens in a new window)
3,062 reviews
  • Rated 3 out of 5 stars
    3 days ago
    Itchy zipper

    I love everything else about this bra, but the bottom of the zipper drove me crazy. It has a little flap to cover the zipper but the flap itself was scratchy. I had to add a piece of fabric to cover the bottom. I found it disappointing that I had to alter a $90 bra .

    I found it also stretched out a lot with washes, even though I was careful.

    Danny C.
    Was this helpful?
  • Rated 1 out of 5 stars
    4 days ago
    Left cuts on my breasts and my chest - and knix won’t allow a return - ZERO STARS

    I’m tempted to say don’t buy from this company at all based on my experience with this item. A good company stands behind all its products and does not try to sell an item that is obviously flawed which is not what is happening with the final sales products. I am not displeased with the superficiality of the product i.e color or style or even as a prior purchaser noted, the awkward jutting out of the zipper that is visible jutting out from even a sweater - but i do expect knix bras to not leave physical scars on my body [this was after a slow 3 mile run - cuts started to form after 1 mile]. So make your own decision about buying from knix at all but definitely do not buy this bra.

    ann a.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 week ago
    Amazing!

    Love love love this bra, have purchased 3 over the past 3 years! Fits great, snug at first but molds to your body after the first few wears/washes. Highly recommend!

    Paige K.
    Verified Buyer
    Was this helpful?
  • Rated 1 out of 5 stars
    2 weeks ago
    Steps aren’t long enough for tall women

    Great concept but straps aren’t long enough. I actually required assistance to remove it.

    Catherine W.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    Go-to sports bra

    My favorite sports bra style for medium to high impact activities because of the comfort and great job it does limiting bounce.

    Elisa B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    2 weeks ago
    KNIX, WE HAVE BEEF!

    This bra is THE MOST size inclusive, heavy duty, high impact, easy on/off sports bra I've found in Canada. I was so happy to have found it to replace my favorite Adidas one that was discontinued. My size 8++ was sold out in cute colors for a while so I was waiting to pull the plug to build a collection. WHY DID YOU DISCONTINUE IT KNIX?!?! WHY WHYYYYYYY.

    I feel like the front zip makes the most sense to avoid the stretching out of the band when like me you have to clasp in the front then twist around. Shefit is the closest alternative I could find but it's in USD and shipping/duties makes it not worth it. Why knix, whyyyyy, you break my heart and all I've done is be a stan and support and buy sooo many of your products 😭😭😭

    Monica
    Verified Reviewer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 weeks ago
    Recommended!

    Very comfortable, true to size, good support. Breathable, felt great even at the end of my shift after wearing in clinic all day. Recommended!

    Vikie B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    3 weeks ago
    Zip Sports Bra

    Love the bra. I have shoulder problems and this is so easy to get on. Exceptional quality.

    Melody J.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    3 weeks ago
    Catalyst is the best for larger bust support

    Catalyst is the only bra style I have worn for years. It is amazing for larger busted (34E) women who want as much support as possible, without feeling like body armor. It is almost seamless, nice wide straps, extremely good quality that lasts years. This is the first time I have tried the front zip Catalyst, and I don't love it compared to the regular version. The front zipper has a bulky top on it that can be seen through clothes, and the racer back is gives me neck pain, but for a racer back sports bra it is as good as it gets.

    Michelle G.
    Verified Buyer
    Was this helpful?
  • Rated 4 out of 5 stars
    3 weeks ago
    Catalyst front zip sports bra

    Most comfortable sports bra I’ve ever owned. So sad it’s been discontinued.

    Judy B.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Love it

    It fits wonderfully. I generally dislike bras. This one is very comfortable.

    Robin H.
    Verified Buyer
    Was this helpful?
  • Rated 5 out of 5 stars
    1 month ago
    Love it!

    Just the bra I needed for when I go on my runs

    Bev W.
    Verified Buyer
    Was this helpful?