Catalyst Front Zip Sports Bra

Putting on this sports bra is light work. Made with encapsulated cups for maximum support and a locked-in feel, you’ll be covered to go the extra mile. 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.

Wireless Bra FAQs

Yes, our Revolution Bra has removable cups.

Sizing can be a bit tricky and Knix sizing might be a bit different than what you’re used to, but we've got you covered! You can check out all of our size charts here or book a Virtual Fitting here

The way that we size our bras at Knix is to allow different body types to fit into one size. The flexible 5 row hook & eye back closure accommodates your personal preference and level of comfort for the underband.


No, all Knix bras are wireless! Wireless bras give you freedom to move and feel your most comfortable and confident self.

Yes, you do. 

Your underband measurement will equal an alpha size. 

For example: 

XXS =28Band, XS=30Band, S=32Band, M=34Band, L=36Band, XL=38Band, XXL=40Band, XXXL= 42Band 

Regular size cups cover =  A - DD 

Plus sizes cups cover =  E - G


We recommend scheduling a Virtual Fitting with a Knix Expert or consulting with a team member in-store.

Write a Review
average rating 4.2 out of 5
Based on 3188 reviews
  • 5 Stars
    1992 Reviews
  • 4 Stars
    546 Reviews
  • 3 Stars
    275 Reviews
  • 2 Stars
    165 Reviews
  • 1 Star
    210 Reviews
81% of reviewers would recommend this product to a friend
Comfort
Rated 4 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Support
Rated 4 out of 5
3188 Reviews
Reviewed by Anonymous
Catalyst Front Zip Sports Bra
Reviewing
Catalyst Front Zip Sports Bra
Current Band Size
38
Current Cup Size
C
Knix Bra Size Purchased - Number Sized Bras
38C
Usage
Sport
Rated 3 out of 5
Review posted

Not great for running

This bra is really comfortable but it did not give enough support for running. It would have been better if the shoulder strap adjusters didn't keep sliding down, making the straps too long halfway through a short run. Maybe I can sew them in place so they can't self-adjust anymore, but why should one have to for such an expensive bra? Just seems like a design or quality issue. I can't use it for casual wear, either, because the zipper sticks out and shows through shirts. I'm pretty disappointed in this expensive bra. I wouldn't recommend.

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Comfort
Rated 4 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Support
Rated 3 out of 5
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Reviewed by Wendy
Catalyst Front Zip Sports Bra
Reviewing
Catalyst Front Zip Sports Bra
I recommend this product
Rated 4 out of 5
Review posted

4 Stars

I love this bra for exercise, for a larger breats it has great support and the comfort is good.

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Reviewed by Janne
Verified Buyer
Catalyst Front Zip Sports Bra
Reviewing
Catalyst Front Zip Sports Bra
I recommend this product
Current Cup Size
B
Current Band Size
36
Purchased Knix Size - Catalyst
3
Usage - Bras
Sport
Rated 5 out of 5
Review posted

Best bra ever

These bras are super… sadly size 3 is still out of stock. Hope they that size filled in a timely fashion.

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Comfort
Rated 5 out of 5
Fit
Rated 0 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large
Support
Rated 5 out of 5
Was this helpful?