Sheer inserts, crystal-embellished trims and frothy ruffles inform this black floor-length dress from Preen by Thornton Bregazzi * It's finished with silk for a truly indulgent feel * Black fabric with sheer and printed panels, round halter neckline with ruffles, crystal embellished trim, cut out back with buttons at nape of neck, zipper fastening * Slim, airy silhouette, floor length