Strappy Long Sequin Prom Dress: Primavera 4592Sparkle under the lights in this strappy open back long sequin prom dress 4592 by Primavera Couture. With swirling sequin embellishments from the scoop neckline to the hem, this long formal dress shimmers with every move at prom, galas, and other black tie events. The long sequin prom dress has thin shoulder straps that lead to the lace up open back, while the long skirt opens in a side slit before flowing into a small train. Combining sparkly details