Features: Integrally-molded, low wind resistance, comfortable and breathable, professional technology, more safes and perfective. Integrated design of insects proof net and lining, detachable cleaning, sweat absorption, breathable,more comfortable to wear. PC shells, impact resistant, inner EPS foam, cushioning and impact protection. There are 24 air holes, reduce stuffiness, increase the air direction of the tuyere, more breathable. Can freely adjust the heads circumference, wearing more convenient. Comfortable lining, velcros fitting, easy disassembly. With deodorant pull belt, more fit the heads, bring better wearing experience.