Because of the open-face design of an ATV or motocross helmet, goggles are required to protect the rider's face. The elastic foam padding used on goggles also functions as a sweatband, keeping flowing sweat away of the rider's eyes. Goggles are also useful when riding in the rain or snow, since they can help keep dust, mud, and debris from getting in your eyes. Other reasons for wearing goggles include hiding facial tattoos and covering up scars. Some riders also choose to wear goggles because it makes them look more aggressive or involved in the sport. Goggles are a must for any dirt bike rider, but especially important if you plan to ride in crowded conditions or rough terrain. If you're just starting out, it's recommended that you buy goggles that fit well but are cheap. As you become more experienced, you can purchase better quality goggles that will last longer. There are three main types of goggles: full-face, half-face, and open-face. Full-face goggles cover the entire face, from the eyebrows to the chin. They are most commonly worn by motorcyclists and cyclists because they offer the best protection against wind noise and other forms of air pollution. Half-face goggles only cover one side of the face at a time, allowing for quick visual adjustments.