Road helmet are the original bike helmets that were made for bicycling on roads and road racing. As they have evolved, they mostly had an elongated shape, always with vents, and are usually made with EPS foam covered by a thin plastic shell. These are the most-used helmets in the world, and millions of them are sold every year. Some are also made more aero-dynamic, and built in a way where wind resistance are minimized and are usually extra light to help riders perform better.