Toast the town in Zac Posen's alluring one-shoulder LBD ? finish with tousled up hair and shoulder-grazing earrings for all-night glamour. Large to size . See Size & Fit tab . Zac Posen dress: black jersey, one-shoulder, draped at asymmetric neckline and back neck, pleated at waist to hem, asymmetric seam detail at front and back, fully lined. Zip and hook fastening at side. 100% viscose; lining: 100% polyester. Dry clean.