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Catalyst Sports Bra - Last Call
Sale
Catalyst Sports Bra - Last Call
$42.50
CAD
$85.00
50% off
Our most supportive sports bra
Eliminates bounce by 76%
Ventilation for increased airflow
Full coverage design
Size and Fit Guide
Use Our Calculator to Find Your Traditional Bra Size
Step 12 of 2
Your Results
Measure Your Under Bust
Measure Your Full Bust
Wearing an unpadded bra, wrap a measuring tape around the top of your ribcage. You’re looking for a snug fit - so we recommend tightening on the exhale and noting the smallest measurement to the decimal.
Wrap the measuring tape around the fullest part of your chest, making sure the measuring tape is paralell to the floor. Relax your shoulders and measure where it falls.
At Knix, your size is
Still have questions? Ask our virtual assistant about finding the perfect fit.
Still have questions? Book a virutal fitting with our amazing customer experience team!
Rewards Members Earn
42 Points
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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
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How to Choose?
Essential
- • Days you don’t need leak protection. Everyday freshness and moisture wicking.
-
0 tsp
Heavy
- • Extra peace of mind. For the first days of your cycle, light bladder leaks, or a full night's sleep without a leak.
-
about 8-14 tsp
-
about 1.5-3 regular pads
-
about 4-7 super tampons
-
about 1.5-3 menstrual cups
Light
- • Daily freshness. For sweat, discharge, period spotting, or backup protection.
-
about 1-3 tsp
-
about 1-3 pantyliners
-
about 1-3 regular tampons
-
about 0.5 menstrual cups
Moderate
- • For mid-cycle flow, surprise cough or sneeze leaks, or a really sweaty spin class.
-
about 4-8 tsp
-
about 1-1.5 regular pads
-
about 2-4 super tampons
-
about 0.5-3 menstrual cups
Ultra
- • Ultimate peace of mind. For the heaviest period days, light bladder leaks, unexpected postpartum flow, or overnight protection.
-
about 15-20 tsp
-
about 1.5-2.5 super pads
-
about 7-11 super tampons
-
about 2-3 menstrual cups
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Total 5 star reviews: 4.2k Total 4 star reviews: 866 Total 3 star reviews: 315 Total 2 star reviews: 207 Total 1 star reviews: 273
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 2 weeks ago
Customers say this sports bra provides excellent support and comfort, particularly for larger busts. Many appreciate the wide straps and wireless design that holds everything securely during workouts and daily wear. Users frequently mention wearing it all day due to its comfort level. However, several note sizing challenges with the newer version, finding it runs smaller than expected and requiring sizing up. Common feedback includes concerns about strap placement and adjustment issues - some straps slide down or loosen throughout the day. A few mention durability problems with glue separation and strap hardware breaking over time. While most praise the supportive fit, some experience gaping at the armpits or find the material feels heavy compared to other sports bras.
89%would recommend these products
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Purchased Knix Size - Catalyst
Usage - Bras
5,851 reviews
- Rated 5 out of 5 stars2 days agoSuper comfortable
Very happy with how well it fits and supports during high intensity sports.
Karin G.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars5 days agoSport bra that’s a perfect fit
I’m glad they have a 30 band with a large cup size. So pleased. Great fit!
Jeannie W.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars5 days agoExcellent Running Bra
Great bra for running! Comfort and support!
Shelley G.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars1 week ago5 Stars
Great support and fit
LeighReviewingCatalyst Sports Bra - Rated 5 out of 5 stars1 week agoCatalyst Sports Bra
This is the best sports bra i have ever had. In part that is because, with the help of the staff, i got one that fit perfectly.
Eileen G.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars2 weeks agoMy favorite sports bra
This is my everyday bra when I teach. I love it. Pay attention to the sizing when you order. Get 5.
Samantha B.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars2 weeks ago5 Stars
Super comfortable and perfect fit
EdnaReviewingCatalyst Sports Bra - Rated 5 out of 5 stars1 month agoMay be a sport bra, but love this for everyday
I bought this bra on a whim along with another knix bra. As a very top heavy person, this is so worth it. So comfortable, band did not stretch (XXXXL++) out as the other one did and love that it is a large chested person can make this no wire bra packable. Will definitely buy this again and highly recommend. No spillage, comfortable and amazing hold.
Susan E.Verified ReviewerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars1 month agoCatalyst Sports Bra
Love this bra! It fits perfect and is so comfortable! Offers great support. Highly recommend! Bought one a few weeks ago and already ordered two more :)
Vicki S.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars1 month agoGreat as usual!
Recently purchased a new catalyst. I've been wearing this sports bra since it first launched and it is a godsend. In the old sizing I used to wear a size 8 and now I'm wearing XXXL+ and the fit is good. Used the knix online measurement guide to find the recommended size.
Laura V.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars1 month agoSurprisingly good
A very structured bra that really works. Very supportive. Have only used for sports; have not tried for daily wear.
Gerri A.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars1 month agoGreat Sports Bra
It has taken many searches to find the right sports bra. It is comfortable and flattering.
Katherine H.Verified BuyerReviewingCatalyst Sports Bra
