Sheer-Corset Long Prom Dress: Colors Dress 3431A classic choice for your big event, this long a line prom dress 3431 has style upgrades that are sure to please. With a sheer corset that wraps around to the back, this beautiful long formal dress gets a flirty look for prom, galas, and other black tie events. The long evening gown has pleated cowl neckline and spaghetti straps, while the long skirt opens in a side slit before flowing to the floor in a figure flattering a line shape. Celebrate your