I don't exercise a lot, but when I do, I need to know that I'm going to stay put during any physical activity.  This bra was recommended to me by my daughter who is an avid gym girl.  Because I'm a plus size, I needed to fit comfortably into the bra without feeling choked.  This one does the trick.  It also doesn't cut into your shoulders.  It's good to catch them on sale, they can be fairly expensive.  But worth it.