I wish this company would advertise it appropriately, because if they did it'd be a 5 star bra.  Sure, it might be just fine for A/B for higher impact, but to pretend this would work for high impact (think running, or burpees even) for a C cup or higher, well think again.

As a compression style 'sports bra' it is a nice bra.  I wear these for zipping around at work or any other time I'm likely to be in a bra for more than 8 hours or so -- that is my underwire/dress bra limit.  However for anything where is even a bit of bounce one needs to 'double bag' so to speak and that still won't help you if you are doing something truly bouncy like running or with any kind of up and down.

That said, as my long shift/low impact bra I love these.  I even can sleep in them when I'm pulling the 24/30 hour type shift that I can nap on.  They are truly comfortable, well made and sturdy enough for that kind of support--as long as you don't mind the uni-boob style.  The material is soft, well made and there are no uncomfortable seams or tags.  They wash well and hold up over time.

If Champion would just admit these are no Enell/Moving Comfort Juno (or even the Maia) for the larger sizes at least, then they'd be getting my 5 star review.  No to 'high impact'.  Yes for low impact, long wear periods.

Because I overall like them, and because I can't speak for the A/B higher impact performance I will still give a 4 star rating.  Just with the caveats for usage.

JTG