Ball (gridiron football)

In Northern America, a football (also called a pigskin) is a ball, roughly in the form of a lemon, used in the context of playing gridiron football. Footballs are often made of cowhide leather, as such a material is required in professional and collegiate football, although footballs used in recreation and organized youth leagues may be made of rubber, plastic or composite leather (high school football rule books still allow inexpensive all-rubber footballs, though they are less common than leather).