More Details Zac Posen Draped Open-Back Sheath Dress Details Zac Posen matte satin sheath dress with cutout trim. Approx. measurements: 42"L shoulder to hem, 31.5"L center back to hem. Bateau neckline. Sleeveless; minimal shoulder coverage. Draped open back. Curved paneled banded waist. Straight skirt and hem. Fitted silhouette. 16"L back slit. Hidden back zip. Nylon/silk; polyester lining. Dry clean. Made in USA.