Fitted baseball hats are now mass produced of course using mostly cloth, plastic, and metal materials. They are normally sewn in six sections and topped with a matching fabric covered button. In order to provide ventilation for the wearer’s head small metal grommets are often sewn near the top of the individual sections of material. Although not as common, the rear of fitted baseball hats can also be made of a netlike mesh material. Unlike the early days the bill is now stiffened by inserting a section of paperboard and covering it with fabric.