Isabel Marant is practically synonymous with insouciant, Left-Bank-bohemian chic, and Etoile is the younger and more wearable — but equally cool — sister of the main line. It's full of relaxed tops, romantic dresses, and plenty of Isabel's signature ruffles and lace. The Mexika silhouette is made of lightweight, drapey printed cotton and pairs just as nicely with polished trousers as it does with faded jeans.