Sexy Long Cut-Out Prom Dress: Atria 6717HStrike a sexy pose in this strappy back long prom dress 6717H from Atria Couture. With a cowl neck bodice, this long formal dress has side cut outs that wrap around to the strappy open back for an alluring look at prom, galas, and other black tie events. Offered in misses and some plus sizes, this exciting long dance dress has a mermaid prom dress that opens in a side slit before ending at the structured horsehair hemline. A small train finishes the