As a large-chested runner, I have a problem finding bras that provide proper support.  This one is no good.  They run small - I wear a 36D and ordered as such.  I could barely snap it and I was spilling out on the top and sides.  Even if it had fit, it comes very low.  When I am running or working out, I am not interested in showing off my goods.  I want them covered and supported and this bra did neither.