Here's a long prom gown with eye-catching details. This slinky formal dress features doubled spaghetti straps that criss cross over the open back into a sultry corset detail that laces up for a comfortable fit. Side ruching makes this sexy evening gown fit smoothly over the curves before opening in a side slit and ending at the horsehair hemline that brushes the floor. Sure to wow the crowd at prom, this long prom gown is as flattering as it is comfortable.