I bought three -- in part, because they were on sale. i do not think that i will ever wear these without a sports bra though. they are too low in the front and on the sides for a regular bra and too thin to go bra-less. that said, they may look cute with some of the lacy-show-me bras that seem to be trendy right now. 

i am typically a small, and bought x-small. the drape is not that different in the two sizes, but the length of the straps was much less revealing in the smaller size. 

all-i