A leather skirt is the sort of piece that you can always rely on to give your wardrobe a grungy touch, and we adore Isabel Marant, Étoile's take on the urban classic. Made from black leather, it works biker-esque styling, with a popper waistband and exposed silver-tone zip detailing, and the design is completed with bold side stripes for a touch of contemporary chic. We're wearing ours with white sneakers.