The fabric of this dress is like a garbage bag--it's like taffeta, but stiffer and plasticier.  I bought it in black and the fabric somehow attracts powder, including powder from laundry detergent, chalk, and dust from the air.  I know that sounds crazy, but I wore it one time, I washed it and it somehow picked up powder in the wash.  I tried a million things to get the white marks off, to no avail.  Maybe you'd have better luck than I did.  But, I wouldn't buy this again.