Amarra Long Formal Dress 88372This elegant prom dress from Amarra is the perfect choice for a formal occasion. It features delicate lace embroidery and a fitted, floor length silhouette. The plunging v neckline and off the shoulder straps add a touch of femininity, while the sheer sides and adjustable lace up back give it a modern twist. Don't forget to show off your leg with the high leg slit.