Headgear is a term used to describe any type of clothing or accessory worn on the head. HATS OR HELMETS are two common types of HEADGEAR. Hats are typically made of fabric or straw and come in a variety of styles, such as baseball caps, fedoras, and beanies. Helmets are usually made of hard materials like plastic or metal and are designed to protect the head from injury. Both hats and helmets are popular forms of HEADGEAR.