Knee-length topcoats and calf-length overcoats were worn in winter. Bull's buff waistcoats, topcoats, trousers and boot uppers were typical of 16th- and 17th-century Englishmen. Since 1990, acrylic topcoats have been used instead for air-quality reasons. Topcoats and overcoats together are known as outercoats. Topcoats had wide lapels and deep cuffs, and often featured contrasting velvet collars.