This is a nice stretchy poly material. The inside of the fabric was white on the shamrock falls color I ordered. I believe a lot of the dark printed fabrics may be similar in that when stretched they look a bit funny as they show a bit of white through but it was not anything major.
I am 5'9" and ordered a 2x. I usually wear a size 18-20 and this fit perfect. The neck was cut really cute so it still covers bra but also looks feminine and flattering.
The bust was a bit tight so that's why the fabric stretched a bit. Issue probably wouldn't exist with a light print.
I wouldn't hesitate to order again but may have sized up.