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In terms of the selection of motorcycle helmets, the following points should be noted: (1) The inner side of the helmet must be equipped with an anti impact pad, and the surface pad material matching the head is thin mesh lining, which should have the effect of absorbing sweat and oil from the head. In addition, a ventilation slot with a depth of more than 10MM shall be provided on the liner to allow air circulation in the helmet. (2) The jaw strap of motorcycle helmet shall be soft, and the snap fastener and other hard protrusions shall not exceed the external surface by 5mm. (3) The motorcycle helmet should be light and comfortable, and the weight of the helmet should not exceed 2KG. (4) The helmet shall not be blocked, stuffy, and the vision shall be open and clear without shielding. The visual angle shall not be less than 105 degrees under static state. (5) The sound from all directions can be clearly heard and distinguished when wearing the helmet, and there should be no vibration and other noises during driving. (6) The helmet shall be equipped with good ventilation and thermal insulation devices, and shall be dust-proof, insect proof and waterproof. (7) Helmets should have good reflective and thermal radiation resistance, and highlight obvious eye-catching colors. (8) The lens of helmet goggles is clear and colorless, and its toughness is not easy to break, so as to ensure that the driver's vision is not affected.