Callipygian Slip Dress, bought new from Opening Ceremony, it's one of the brands they produce. Can be worn out, layered or even to bed. Only worn a couple times, in great condition. Black pleated silky fabric with lace trim and invisible side zipper. Delicate spaghetti straps, v-neck with lace. Midi length. Reminds me of Issey Miyake and Celine. Fits true to size and the pleated fabric is flexible and flattering. I'm a Small 4/6 but I wore this as a true size 6 and I liked how it fit.