Drape-Back Long Mermaid Prom Dress: Atria 6742HFrom Atria Couture, this open back long mermaid prom dress 6742H is as figure flattering as it is alluring. A captivating choice for prom, galas, and other formal events, this empire waist long evening gown has a deep v neckline and thin shoulder straps that create a statement as they criss cross the open back. Offered in misses and some plus sizes, this long formal dress has a mermaid skirt that flows to the horsehair hemline, while a back drape