The Ulster is a Victorian working daytime overcoat, with a cape and sleeves. It is often seen in period productions of Victorian novels, such as those of Charles Dickens and Sir Arthur Conan Doyle. The Ulster coat was referred to in Doyle's Sherlock Holmes stories A Study in Scarlet, The Sign of the Four, "A Scandal in Bohemia", "The Adventure of the Blue Carbuncle" and "The Adventure of the Noble Bachelor".
Often made of hard-wearing fabrics, such as herringbones or tweeds, it was not a formal coat at the time, though in the 20th century a cape would be seen as such. After the Edwardian period, it lost its cape, and continued to be used as a heavy-duty overcoat, often in a double-breasted style.