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.

average rating 4.2 out of 5
Based on 3176 reviews
  • 5 Stars
    1985 Reviews
  • 4 Stars
    544 Reviews
  • 3 Stars
    272 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
3176 Reviews
Reviewed by Cat W.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Comfort, support

the cross strap back means I don’t have to keep windmilling my arms to move the slipping bra straps back in place. they just stay put. The zipper front has a comfort level you don’t get with any other closing.

Loading...
Comfort
Rated 5 out of 5
Fit
Rated -1 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?
Reviewed by Augusta A.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Best support

Great bra, very comfortable for all day wear.

Loading...
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?
Reviewed by D
Verified Buyer
POS - Catalyst Front Zip Sports Bra (HIBRA102)
Reviewing
POS - Catalyst Front Zip Sports Bra (HIBRA102)
I recommend this product
Rated 5 out of 5
Review posted

Excellent Choice for High Intensity Workouts!

Easy to put on and take off, very adjustable (straps and band), does not move during workouts, remains smelling fresh even after sweaty workouts, and provides comfortable support during high intensity workouts of all kinds (including those with lots of running and jumping)! Also washes well and dries quickly!

Loading...
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?