Helmet with good cushioning, shock resistance, heat insulation, moisture, corrosion, and other advantages, and non-toxic, does not absorb water. Helmet material is highly wear resistant, can effectively prevent the strong impact and collision with a hard object, rather than protecting the head role. ARC helmet made of high quality plastic material, the shape is an arc-shaped design. ARC helmet mainly for use when riding a motorcycle, case number 9/, wholesale price negotiable, volume one.