 Mill workers in Yorkshire and Lancashire wore a variant of this basic outfit with English clogs.The cuffs of the pants were frequently secured with string, and grandad shirts were worn without a collar to decrease the likelihood of being caught in the steam powered machinery.Since the late 18th century, merchant seamen and dockworkers have worn denim flared trousers, striped undershirts, knitted roll neck jumpers, and short blue peacoats.