A motorcycle helmet is a type of protective headgear that motorcyclists wear to protect their heads during accidents or crashes. It is designed to absorb the shock and impact of a collision and reduce the risk of traumatic brain injury, skull fractures, and other life-threatening injuries. A typical motorcycle helmet consists of a shell, an impact-absorbing liner made of foam or other materials, a comfort liner, and a chin strap. It also includes a visor or face shield to protect the eyes and face from wind, debris, and insects. Motorcycle helmets come in different sizes, shapes, and styles to accommodate varying head sizes and personal preferences. In most countries, wearing a helmet when riding a motorcycle is mandatory by law, and failure to comply can result in fines or penalties.