Does not separate double D's
This one I am returning. I compared it to the Shock Absorber D+ Max and it lost. First of all, be aware that this bra does not separate. You will be mashed together unless you separate with a balled up paper towel or the like. As far as keeping big breasts stationary, I could detect no improvement over the Shock Absorber D+ Max. I tested both this running bra and the Shock Absorber D+ Max bras by jogging through the house and jumping on the rebounder. Since the Shock Absorber D+ Max is sooo comfortable, separates, and supports equally as well, I'm sticking with it. Also know that this running bra's top clasp does feel different from regular straps. Not uncomfortable, just takes a little getting used to if you are not used to this style. I likely would have kept the bra if it had separated. According to my tests, being mashed together in a running bra does not keep big breasts any more stationary than the Shock Absorber D+ Max.