I just received the black dress in the mail and I LOVE IT! I was surprised by how well it fits. The material is a nice, firm but stretchy polyester and spandex material. There's a sort of built-in slip underneath the flowing skirt so you might get away with not wearing a slip. The angle created by the cap sleeves and "sweetheart" neckline is beautiful and sexy--even my kids said I look pretty in the dress. I ordered a large to allow for my hips, but I think I could have worn a medium because the lower portion is so flowing. I wish this dress came in red, I'd order it for sure. The care label says Dry Clean Only, but I think a gentle cold wash would be fine--I'll see.