This black silk and wool-blend gabardine Cassatt trench coat was first unveiled as part of the sixth look in Gabriel Hearst's Resort 2018 lookbook. It's tailored in Italy to a double-breasted silhouette with shoulder epaulettes and a coordinating belt to define the waist and then falls in slender panels to a flared hem. Leave it open over a ribbed-knit sweater and tapered trousers to reveal hints of the silk-crepe interior.