A birrus or birrus brittanicus was a rainproof, hooded woollen cloak (or simply a hood alone), characteristically worn in Britain and Gaul at the time of the Roman Empire and into the Middle Ages. [1] [2]
A mosaic at Chedworth Roman Villa shows a Briton wearing a birrus brittanicus; [3] there is also one shown on a statue of a ploughman at the British Museum. [4]