Simple and sweet, this one-shoulder long formal dress is a modern style for the girl with a busy social calendar. Whether you're going to prom, a black-tie wedding, or another formal event, this long designer dress by Mac Duggal flatters the figure with an unpretentious design. With a fitted look from the asymmetrical neckline to the hem, this long evening gown has one shoulder strap that attaches to two bands that flow diagonally over the open back, while the long skirt hugs the curves before ending at the floor. Combining elegant simplicity and figure-flattering style, this one-shoulder long formal dress is sure to become a new favorite for very special events.