I bought two of these recently, they say 'runners seeking good chest support' absolutely not. If you happen to be blessed with larger boobs don't bother with these. The adjustable straps at the back like to adjust themselves as you run! As I'm on the short side i have to have the straps at the shortest they can go, however after running the straps are at the longest so I get an 5 inches of bounce!! Awful!
Very comfortable Would like to have been able to tighten more
Would buy again
How securely it holds you to minimise "bounce" Nothing/none
Make sure you unhook the fastening at the back before trying this on - although I know from experience it is still possible to try it on without doing this, albeit it a little bit awkward!
I love how securely this holds me to minimise "bounce" so do take time to try this bra on to check you have the right size for you.