Gorgeous structural seams, one of designer Zac Posen's signatures, flow into a fit-and-flare skirt on this long satin party dress. Tiny jewels adorn the spaghetti straps, which give way to a geometric open back.

• Truly Zac Posen, exclusively at David's Bridal
• Polyester
• Back zipper; fully lined
• Dry clean
• Imported