Also known as half-shell helmets, a half helmet covers only the top of the head, giving a motorcyclist little protection and exposing him to wind, snow, rain and anything that is caught up in it. The half helmet has been popularized by motorcyclists who style themselves as rebels, but is rarely seen on true long distance riders, because of how tiring it is to absorb the wind over hours of riding. The highest degree of protection is offered by full face helmets, which cover the whole head and almost all of the face and extend to below the chin, usually worn with a hinged plain or tinted visor or sunglasses. The advantage of a full face helmet is the protection against the elements, dust, insects and flying debris. Disadvantages include the weight and difficulty of conversing without first removing it. Racing helmets fall in this category, are usually lighter and easier for extended wear, but tend to be rather expensive, since they are made from premium materials.
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