Catalyst Sports Bra
10% off Bra & Underwear Sets
![Sydney is a 34A and wears a Knix size 1](https://cdn.shopify.com/s/files/1/0895/3474/files/01_Knix_OnFig-EComm_Jul_2024_Active_Catalyst_Leakstrong_LP_Legging-Black_00209.webp?v=1721772545&width=800&height=1037&crop=center)
![Product image](https://cdn.shopify.com/s/files/1/0895/3474/files/HIBRA103LT2_FRONT_Black.webp?v=1738187160&width=800&height=1037&crop=center)
![Sydney is a 34A and wears a Knix size 1](https://cdn.shopify.com/s/files/1/0895/3474/files/01_Knix_OnFig-EComm_Jul_2024_Active_Catalyst_Leakstrong_LP_Legging-Black_00238.webp?v=1738187160&width=800&height=1037&crop=center)
![Sydney is a 34A and wears a Knix size 1](https://cdn.shopify.com/s/files/1/0895/3474/files/01_Knix_OnFig-EComm_Jul_2024_Active_Catalyst_Leakstrong_LP_Legging-Black_00073_8daa09e4-73e5-422d-a692-246c07e8e102.webp?v=1738187160&width=800&height=1037&crop=center)
![Product image](https://cdn.shopify.com/s/files/1/0895/3474/files/CatalystSportsBra-SizeChart-Feb7_d918beec-5bd8-41e2-bb8e-feb45a96f097.jpg?v=1738954967&width=800&height=1037&crop=center)
Catalyst Sports Bra
10% off Bra & Underwear Sets
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 by 76%*. 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. *During treadmill running; based on University of Portsmouth Research Group in Breast Health study, 2018.
🇨🇦 Free standard shipping over $100.
Free expedited shipping over $150.
(after discounts, before shipping + taxes) All items ship from within Canada.
All Knix bras are eligible for return or exchange within 30 days of delivery. We want to make sure you can give your new Knix products time to mold to your shape and get comfortable. For sale items with a 20% or more discount you may exchange for another item or store credit.
- Patricia B.Verified Buyer12 hours agoRated 5 out of 5 starsExactly as advertised .
Nothing moves during exercise. It is comfortable and supportive. Just what I was wanting. Thank you Knix.
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeSupportRated 5.0 on a scale of 1 to 5Low HighEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentEase of Use Rated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful? - Jacqueline R.Verified Buyer5 days agoRated 5 out of 5 starsCatalyst bra
I just received my new catalyst bra. I already have 3 that I bought quite a few years ago that are still going strong.
One thing with the new bra, I am very happy about is the change in straps, say the old bras very often while exercising the strap would come undone. So this is a very welcome edition. There is only one thing I was sad about, I. Loved the washbags that used to come with the catalyst bras and mine have been used so often that one is threadbare so I was hoping for another one I guess that perk is no longer accessible.
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeSupportRated 5.0 on a scale of 1 to 5Low HighEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentEase of Use Rated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful? - PollyVerified Buyer6 days agoRated 5 out of 5 starsComfortable
I really like the comfort of this bra. Not restricting. Only negative I have is it tends to pucker a little in the material at top edge between cups. Maybe a dart there would help.
ComfortRated 5.0 on a scale of 1 to 5Poor ExcellentFitRated 0.0 on a scale of minus 2 to 2Runs Small True to Size Runs LargeSupportRated 5.0 on a scale of 1 to 5Low HighEffectivenessRated 5.0 on a scale of 1 to 5Poor ExcellentEase of Use Rated 5.0 on a scale of 1 to 5Poor ExcellentWas this helpful?