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Catalyst Sports Bra - Last Call
Last Call
Catalyst Sports Bra - Last Call
$39.00
CAD
$85.00
30-54% 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? Reach out to info@knix.com to learn more about our sizing.
Rewards Members Earn
39 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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Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 4 months 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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Current Band Size
Current Cup Size
5,914 reviews
- Rated 5 out of 5 stars50 minutes agoMy favorite sports Bra
Snug in all the right places!
TWTisha W.Verified BuyerReviewingCatalyst Sports Bra Pink Party / S++ - Rated 5 out of 5 stars3 days agoCatalyst sports bra
Great fit, comfortable, good support.
KPKelly P.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars3 days agoA must have for horseback riding!
I got this bra for my riding lessons to help with the "bounce" while trotting, and it works like a CHAMP. I am so impressed at how well this bra hold me in!
MMMeagan M.Verified BuyerReviewingCatalyst Sports Bra Black / XXL+ - Rated 5 out of 5 stars4 days agoBest Sports bra ever!
And now that they come in M++, they fit my 34F chest better. So comfortable that I often wear as a daily bra—one that is ready for action yet easy to wear all day.
Please keep the cute and colorful patterns coming!
KMKimberley M.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars5 days agoGreat, supportive bra
I have several of these bras. I know this is a "sports bra" but I wear it all the time. It is supportive and has good coverage.
AGAlison G.Verified BuyerReviewingCatalyst Sports Bra - Rated 5 out of 5 stars1 week agoPerfect support bra
I love the catalyst bra it fits well and has great support
JOJennifer O.Verified BuyerReviewingCatalyst Sports Bra Pink Party / M+ - Rated 5 out of 5 stars1 week agoGreat
Perfect fit
KFKrista F.Verified BuyerReviewingCatalyst Sports Bra Black / XL+ - Rated 5 out of 5 stars1 week agoMost comfortable sports bra
This sports bra is really comfortable and so light you feel like you almost have nothing on. I’ve owned many other brands but Knix tops them all.
JBJocelyne B.Verified BuyerReviewingCatalyst Sports Bra Warm Sand / XXXL+ - Rated 5 out of 5 stars1 week agoLove the bra!
Great support!
MBMarguerite B.Verified BuyerReviewingCatalyst Sports Bra Black / XXXL+ - Rated 5 out of 5 stars1 week agoMost comfortable bea ever!
I have been wearing the Catalyst for years, for workouts and as my everyday bra, because it is the most comfortable bra I have ever worn. Knix customer service is amazing too!
BHBarbara H.Verified BuyerReviewingCatalyst Sports Bra - Last Call Olive / M+ - Rated 5 out of 5 stars1 week agoGreat sports bra that fits!
Love this bra and the size! It fits and is comfy - could wear it all day!
HSHamreet S.Verified BuyerReviewingCatalyst Sports Bra Pink Party / XL++ - Rated 5 out of 5 stars2 weeks ago5 Stars
I dislike this product. Within a week the band at the back was already ripping apart and one of the hooks becoming loose. I’m very dissatisfied with this product.
CCatherineReviewingCatalyst Sports Bra Black / XXL+
