Rosie Assoulin brings her particular brand of cool to this light-blue cotton and silk-blend Negligee gown for SS17. The use of lightweight striped shirting fabric gives the floor-pooling silhouette a borrowed-from-the-boys allure, while the deep V-neck and skinny shoulder straps lend it sultry appeal. Style it simply with heels and dainty jewellery for a red carpet-worthy look.