Here's a beautiful long jersey prom dress with just the right amount of sparkle. From Amarra, this long designer dress features a beaded bodice with plunging v-neckline and double spaghetti straps that criss cross the open back. The backless formal dress has a hip-hugging long skirt that opens in a side slit before flowing to the floor in a mermaid style. So hot for prom, pageants, and other formal events, this long jersey prom dress by Amarra is an elegant choice for your big night.