Momenta Racerback Sports Bra
Medium support sports bra
Works as a workout top
Cool mesh ventilation
Hardware-free design





Cassaerea is a 34G and wears a Knix size M++


Cassaerea is a 34G and wears a Knix size M++

Cassaerea is a 34G and wears a Knix size M++
Cassaerea is a 34G and wears a Knix size M++
Momenta Racerback Sports Bra
Medium support sports bra
Works as a workout top
Cool mesh ventilation
Hardware-free design
Size and Fit Guide




Shipping
Shipping
Processing Timelines
Please allow 1-2 business days for our warehouse team to pack and ship your order. During peak periods such as sales, holidays and product launches, please allow up to 4 business days for us to process your order.
Delivery Time
For the most up-to-date delivery time estimates, please refer to the shipping timeline at checkout. Delivery timelines vary depending on location and do not include processing times.
Shipping Charges
Orders over $100* CAD = Free Shipping (2-6 business days)
Orders under $100* CAD = $12 CAD Shipping (1-3 business days)
Orders delivering to NWT, Nunavut and Yukon are subject to $20 delivery fee.*After discounts, before shipping and taxes.

Returns
Returns
Free Returns
Knix covers the return shipping fees for exchanges and refunds initiated through our Return & Exchange Portal. Exchange orders initiated through our Return & Exchange portal are also eligible for free shipping within the USA and Canada. Please note, the shipping fees on your original order are non-refundable.
Return Policy
Return policy varies by product, please check if your item is refund or exchange eligible by viewing our full policy here.
Sale & Last Call
Items discounted below 30% are eligible for size exchange or store credit. Items discounted 30% and above are final sale – no refunds, store credits, or exchanges can be accommodated.
"...keeps her cooler and drier than other sports bras"
- NBC News
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Free standard shipping over $100.
Eligible for return or exchange within 30 days of delivery. The item may be washed, worn, and without tags to qualify.Zoom




How to Choose?
Essential
- • Everyday Wear
- • No leakproof protection
Heavy
- • heavy period days
- • overnight protection
- • light bladder leaks
Light
- • light period days
- • sweat
- • sweat and discharge
Moderate
- • moderate period days
- • light bladder leaks
- • sweat
Ultra
- • extra heavy period days
- • overnight protection
- • light bladder leaks
Explore Best-Sellers
- Rated 5 out of 5 stars2 weeks agoMake more colours!
This is the only sports bra I’ve ever found that comes remotely close to fitting my large cup and small band/shoulder size well enough to work out in - I wish it came in more colours!
MeganVerified BuyerWas this helpful? - Rated 5 out of 5 stars3 weeks agothe MOST comfortable sports bra I've owned
I have big boobs and needed a good bra for running (high impact) - this one is it.
It's comfortable as hell, it's got a mesh vent in the bottom front that helps things air out, the sweat wicking is magical. I worried about how hard it would be to get off when I was sweaty and tired since it's a pull on, but it goes on and off easier than any other pull on sports bra I've owned. As someone else mentioned, the sewn in pads really are easy to adjust. Everything stays where it's supposed to, nothing rubs. I've used it 3 times and am already looking to buy more.
Lisa R.Verified BuyerWas this helpful? - Rated 5 out of 5 stars3 weeks agoSoft and smooth sports bra
This bra fits well. True to size.
Seems a bit tighter than my first one. But my original may have stretched a bit.
I like the cups that are partially sewn in.
Mary H.Verified BuyerWas this helpful? - Rated 5 out of 5 stars1 month agoLove!
This is such a great sports bra. Great support for working out and looks great to wear on its own - great for this hot weather! Bought in both colours - please bring more fun prints in this one!
Stephanie W.Verified BuyerWas this helpful? - Rated 3 out of 5 stars1 month agoThe sizing chart isn’t the best
I like the bra but it’s not as comfy as the others I have.
It tough to get on overhead and it kinda rolls underneath the cups. I had to return my regular size to get the next size down and then it was fine.
Lisa J.Verified BuyerWas this helpful? - Rated 5 out of 5 stars1 month agoGreat product
Very comfortable and gives the support I wanted. Always pleased with everything I order from Knix.
Louise S.Verified BuyerWas this helpful? - Rated 4 out of 5 stars1 month agoSports Bra
Sports bras need an adjustment period. I'm still getting used to it.
Victoria E.Verified BuyerWas this helpful? - Rated 5 out of 5 stars1 month agoLove this bra!
So comfy, fits well and great support. Even when it is hot in summer, this bra is my go to!
Jackie E.Verified BuyerWas this helpful? - Rated 5 out of 5 stars1 month agoGood purchase.
Like it. Will order other colours.
Charlotte D.Verified BuyerWas this helpful? - Rated 2 out of 5 stars2 months agoPoor fit (for me)
I’m usually a medium, but the medium fit was off. The band was too high up, such that it felt like it was riding up on the bottom of my breasts. So I went for a large, which fits okay in the torso length but after a few wears now gapes at the back so I’ll be donating it. I’ve never had this fit issue before so I don’t think it’s that my body is that different from everyone else.
For reference, I’m 5’8”, 147lbs, and have a small bust of 34 inches and under bust of 31 inches and I was using this bra for running.
HKVerified BuyerWas this helpful? - Rated 5 out of 5 stars2 months agoLove it!
You can wear these with anything especially a low cut tank top!
Jaime K.Verified BuyerWas this helpful? - Rated 5 out of 5 stars2 months agoGreat sports bra
This is super comfortable. It felt a little snug putting it on the first time, but it actually feels very supportive and not restrictive. The vent is great, I wear it to kickboxing and there’s definitely less sweat to wipe away under the breasts afterwards compared to my other sports bras.
Terri C.Verified BuyerWas this helpful?