One-Shoulder Long Formal Dress: Mac Duggal 11947Get a couture look in this one shoulder long mermaid formal dress 11947 by Mac Duggal. An exquisite design for prom, galas, and other black tie formal events, this long special occasion dress has a sparkly beaded shoulder strap that shimmers with every move. The other shoulder strap is actually a banded sleeve that drapes romantically over the upper arm, while the long mermaid skirt flows to the floor with a flourish. A beautiful silhouette for your