I just bought my second set of these bras.  I bought them a bit small (medium - I'm normally a 36C).  Does the bottom roll? Probably.  Is there a ton of support so that you can go jogging?  Probably not.  Can everything be seen if you get cold?  Yes.  BUT, If you are just hanging around the house and want something comfortable, these can't be beat.  They aren't as soft as the barely there products, but they offer more support.  Don't complain if they aren't a sports bra, because they aren't.