Because it fits so well, the Moving Comfort Fiona bra was the only style bra I would run in. For a while now I've longed for a racer back but was too afraid to give it a shot, not to mention they ain't cheap. I finally bit the bullet and tried the Rebound Racer and was pleasantly surprised that not only does it work as well as the Fiona, for me it actually works better. It's lighter and equally if not more supportive, and I don't have to use Glide to keep the chafing down. Most importantly, the girls stay put. I will say that there's a bit of an unflattering underarm effect, but even with that, the comfort is fantastic (if you have to carry around what we larger women carry around). The only downside is that Moosejaw's sizes aren't terribly wide-ranging (no pun intended). C'mon MJ, a few DDs in the line-up couldn't hurt. Well, they could in the wrong bra, which is why we need them! Bottom line: I am a huge fan of this bra.