Derek Lam's navy and black gown is from the Pre-Fall '14 presentation - a collection of glamorous, American sportswear-inspired looks. It's cut from structured satin and is cinched at the center with a seamed waist. The cutout back and deep slit add lightness to the fabric.

• Navy and black satin
• Concealed zip fastening along side
• 70% acetate, 30% viscose
• Dry clean