MILLY Gem Collar Sheath Dress in Charcoal. - size L (also in ) MILLY Gem Collar Sheath Dress in Charcoal. - size L (also in ) Cotton blend. Unlined. Knit fabric. Back zipper closure. Bead embellished collar. Back slit. MILL-WD806. 190 OK 120020. The MILLY collection epitomizes bold, advanced contemporary fashion with a feminine edge. Designer and founder Michelle Smith transforms classics by merging American sportswear silhouettes with distinctive Parisian atelier techniques. Smiths eye for impeccable detail, use of luxurious, cutting-edge fabrics and precise tailoring have made MILLY a cult favorite across the globe.