Backless Long Prom Dress: PromGirl Exclusive 250279Simple, yet sexy, this backless long prom dress smoothly hugs the curves from the v neckline through the hips. Sold exclusively at PromGirl, this tight prom dress has thin spaghetti straps that round the shoulders and border the completely open back. Ruching below the open back detail is covered by a draped sash that flows outward on this v neck prom dress into a train. Have all eyes on you from every angle when you wear this backless simple prom