The first baseball caps were worn by the New York team, the knickerbockers, around 1840, and they were made of different fabrics and worn by people from all walk of life. There is no age limit to the wearing of a basballs cap. everyone from small children to seniors has adopted the cap. the cap are comfortable to wear and adjustable for a good fit. and they are often made of fabric that makes them cool to wear on a hot day. but for many people, they are also a fashion statement.