I ordered this because of the color, thinking that the open back would be very limiting in terms of where this could be worn.....but I've used it for running (with a sports bra) and just as everyday athleisurewear (is that a word?) with a full length bra cami underneath and it translated well to both. The blue is really pretty (SO pretty) and the x-back is super stylish (I wish they'd stock more Hyba sports bras!) - and because the back is not full, the shirt skims & flows nicely, not tight anywhere. Ordered my usual size. Love Hyba!