Zip Sheath Dress. Crafted in Spanish bonded crepe. Sleeveless dress with exposed zippers at the sides. Exposed back zipper. 71% polyester, 24% viscose, 5% elastomer. MILLY designer and founder Michelle Smith adds a twist to a timeless shift dress with exposed zippers at the sides and back. Dress it up with metallic heels and bold accessories. Dry clean only.