Designed to stand out, this strappy open-back long prom dress 7042H is a real confidence builder. Tight fitting from the scoop neckline to the hem, this backless sexy long formal dress from Atria Couture has a ruched empire waist that wraps around to the sides, while thin shoulder straps double before criss crossing the open back. Offered in misses and some plus sizes, this long evening gown has a hip-hugging skirt with booty-contouring ruching, a thigh-high side slit, and a back godet that pools into a train. A mesmerizing choice for prom, galas, and other formal events, this open-back long prom dress combines intriguing details and a flattering silhouette for a stand-out look.