Strappy-Back Long Prom Dress: Amarra 89499Shine bright in this strappy open back long prom dress 89499 by Amarra. With eye catching embellishments from the plunging v neckline to the hem, this elegant long formal dress is sure to catch the light at prom, galas, and other black tie events. The gorgeous long evening gown has thin shoulder straps that criss cross the open back before tying into a bow for the best fit. The long skirt opens in a side slit before ending in a small train to make