Strappy Long Mermaid Prom Dress: Aerie Couture 212Show off the curves in this long mermaid prom dress 212 from Aerie Couture. With an empire waist bodice, this tight long formal dress offers a long, lean look for a fitted look at prom, galas, and other black tie events. Thin shoulder straps lace up over the open back for the best fit, while this long evening gown has a hip skimming long skirt that flows into a train that adds a dramatic look. Offered in misses and some plus sizes, this long mermaid