Strappy-Back Long Black Prom Dress: La Femme 33115From La Femme, this strappy open back long black jersey prom dress is a slinky choice for your big night. Whether you're going to prom, a fancy gala, or another formal event, this long black designer dress is as figure flattering as it is seductive. With a v neck bodice that wraps around to sheer side panels, this long black evening gown has thin shoulder straps that criss cross the open back before lacing up for the perfect fit. Booty contouring