The first baseball caps were worn by the New York team,the knickerbockers,around 1840,and they were made of straw.Today baseball caps are made of different fabrics and worn by people from all walks of life.There is no age limit to the wearing of a baseball caps. Everyone from small children to seniors has adopted the cap. The caps 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.caps keep the sun out of your face and protect you from the rain, but for many people, they are also a fashion statement.