I'm fairly busty up top, so I have to wear a moisture wicking quick drying bra under the tri top (well, as quick drying as one that's very supportive can be ). I lost a lot of weight a few years ago, and although I was glad to lose my chest, the skin was saggy like an old woman, so when I gained most of the weight back (I knew I couldn't maintain the loss), the fuller top shelf was the one thing I was glad to see come back (not the thighs and butt tho).