“I got this in a size large because that is the size I normally wear from AT. This runs slightly big and I possibly could wear a medium. The material is typical of sports bras. My one complaint is the padding. After two kids, I need the padding for modesty purposes but removable padding is a minor irritation that, when built up over time, drives people (like me) over the edge. I end up removing them because the tarnish on my soul from years of these removable pads in all sorts of sports bras is too much bear. Commit to sewing them in place or just leave them out.”