Question: what are breeches made of?
Answer: Dress breeches are tight fitting and have buttons and a strap and buckle (which are detachable) closure at the bottoms, made of velvet or barathea wool, used for livery, formal and court dress. From the 1890s to the 1930s a form of breeches called knickerbockers or knickers (US) were in fashion with both men and boys.