Warning: Ipad pictures :p
Okay here is my airowear vest, right when I grabbed it off the hanger. It was very stiff and flat when I grabbed it, since it is activated with heat to conform to a body. In the summer it was a lot easier to mold with just my hands, but it was 90F out then, and it's 40F right now. http://db.tt/yyhhfBsm
I put it on and it was tight around my curves, but within 5 minutes it shape to my body and kind of "disappeared" where I barely noticed it. http://db.tt/LETNQPg0
The picture does not do it justice at all.
I took it off after 5 minutes, and it went flat to having indentions to where my breasts are. http://db.tt/l7R4cA0w
I really, really wish I had a working camera right now to really show the molding effect these vests have. I love how the shoulders have adjustments on them, and the sides. If you are flat chested, it will mold to that. I wear a medium about as half as tight as it can go, and I am a B32. I would just look at a sizing chart and go from there. I actually ordered medium and large at the same time, and tried them both on to see, and sent the large back (: Hope this helps!