The wearing of academic scarves is a tradition found at many colleges and universities in English-speaking countries, and particularly in the United Kingdom and Ireland. Sets of two or more coloured stripes have traditionally been used as part of the distinctive visual identity of these institutions. The scarves are usually made of Saxony wool and traditionally 6 feet long. The traditional vertical stripes were adopted first at the University of Cambridge during the Second World War when material scarcity created scarves made of strips of wool sewn together rather than woven into the fabric.