New Lulus Backless Black Bodycon Dress Size Medium. New Lulus Backless Black Bodycon Dress Size Medium. Bodycon Mini Dress never left but she's back at it! Sleek stretch knit shapes this figure-flattering dress and its square neckline, tank straps, and darted bodice. A trio of hook-and-eye closures secure the wide back cutout above the bodycon mini skirt. Hidden back zipper/clasp. Details Shell: 95% Polyester, 5% Spandex. Hand Wash Cold. Imported. Fully lined.