Velvi Long Satin Prom Dress LilianaFrom Velvi, this open back long satin prom dress, named Liliana, is as beautiful as it's name. The long designer dress is crafted in gleaming satin from the scoop neckline to the hem for an elegant look at prom, galas, and other red carpet events, Thin shoulder straps create a statement as they lace up over the open back of this fabulous long formal dress, while the long a line skirt opens in a side slit before draping romantically to the floor.