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A trench coat or trenchcoat is a variety of coat made of waterproof heavy-duty fabric, originally developed for British Army officers before the First World War, and becoming popular while used in the trenches. Originally made from gabardine, a worsted wool fabric waterproofed using lanolin before weaving, the traditional colour of a trench coat was khaki. Popularised by film stars such as Humphrey Bogart, and Peter Sellers in the Pink Panther films, the trench coat has become a fashion staple, available in many colours, through brands such as Burberry.