The fabric is a lightweight cotton in dark gray with a diagonal stripe. On one side of the fabric the diagonal is dark and the other side it's white. I decided that the darker stripe side would be the "right side".
The neck binding seems to be placed right but I think the problem is that the arm hole is very shallow. A deeper angle at the armpit would probably make it more comfortable.
Overall, it's a really cool dress and I could see making it again once I get the sizing figured out. It's a great dress for summer weather, nice and breezy.