Mumu Champagne Satin Open Back Maxi Dress Small Mumu satin-feel maxi dress in a soft champagne/light tan tone with an open lace-up back and flowy full-length silhouette. Beautiful for bridal events, bridesmaids, prom, weddings, or other formal occasions. Size: Small Good pre-loved condition. #bridesmaiddress #promdress #maxidress #formalwear #opbackdress