Toppers are items of clothing that are worn on the head. The term 'toppers' can refer to four different items: caps, HATS, LIDS, and sunbonnets. Caps are typically made of a stiff material such as cotton or wool, and have a brim that is either flat or curved. HATS are usually made of felt or straw and come in a variety of shapes and sizes. LIDS are similar to HATS but are usually made of plastic or metal and are designed to fit snugly on the head. Sunbonnets are a type of hat that is made of fabric and has a wide brim that covers the face and neck.