A baseball cap is a type of headwear characterized by a rounded crown and a stiff, protruding brim. Originally designed for players of baseball, it has become a popular fashion accessory for people of all ages. The cap is typically made from cotton or polyester and can feature various designs, colors, and logos. Baseball caps often include an adjustable strap at the back, allowing for a comfortable fit. They are commonly worn for sun protection, casual outings, or as part of team uniforms. Many sports teams and brands produce their own versions, making them widely available and collectible.