Complete novice here with a question on skinguard fit. I'm not sure what size to get --I'm tall and thin, about 6'1"/160. In T-shirts, I normally wear a large t-shirt, which gives me a nice, comfortable, non-clingy drape; medium tees fit me snugly, closer to the way a skinguard should. So, should I buy a large skinguard and expect it to have the right cling fit, or would I be better off with a Medium? Thanks.