Electra Slip Dress Electra Slip Dress Polyester blend. Made in China. Dry clean recommended. Fully lined. Pull-on styling. Asymmetric neckline Crisscross back straps. Satin fabric. MILL-WD1019. 14JD71. 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.