The following points should be paid attention to in the selection of motorcycle helmets:
(1) The inner side of the helmet must be equipped with an anti impact pad. The surface pad material consistent with the head is thin mesh lining cloth, which shall have the function of absorbing sweat and head oil. In addition, a vent slot with a depth of more than 10mm shall be opened on the pad to circulate air in the helmet.
(2) The jaw strap of motorcycle helmet shall be soft, and the snap fastener and other hard protrusions shall not exceed 5mm from the external surface.
(3) Motorcycle helmets should be light and comfortable. The weight of helmets should not exceed 2kg.
(4) The helmet shall not be blocked, stuffy, wide and clear field of vision, no shelter, and the field of vision angle shall not be less than 105 degrees in the static state.
(5) When wearing the helmet, you can clearly hear and distinguish the sound from all directions, and there should be no vibration and other noise during driving.
(6) The helmet shall be equipped with good ventilation and thermal insulation devices, which can prevent dust, insects, water, etc.
(7) The helmet shall have good reflection and heat radiation resistance, and highlight obvious eye-catching colors.
(8) Helmet goggle lens is clear and colorless, and its toughness is not easy to be broken, so as to ensure that the driver's vision is not affected.
(9) The helmet material shall be glass fiber laminated structure.
Generally speaking, when choosing a helmet, the first thing to consider is the burden on the neck when wearing the helmet, and feel its weight when the body maintains balance. The balance of the helmet is very important, because the closer the center of gravity of the helmet is to the center of gravity of the head, the less likely it is to fatigue. Therefore, the important thing is not the weight of the helmet itself, but the balance performance of the helmet.
From the safety point of view, when the helmet is strongly impacted, the soft foam spacer inside the helmet can make the impact not hurt the human head. Some damaged helmets have three or four hit marks almost at the same place. As for the air permeability of the helmet, the ventilation device is not installed near the opening of the protective sleeve of the helmet itself, but on the protective sleeve body, mainly to maximize the protective range of the helmet when it is impacted.
The suitability of helmet generally speaking, it can be worn on any head type. However, attention should be paid to the permeability and size of the helmet. When riding with helmets, you should not feel that the helmets tighten your neck and wrap your head tightly, resulting in poor breathing. At the same time, the size of the helmet should try to choose a suitable safety helmet that will not move when shaking its head, and will not wear the protective sleeve at the bottom of the helmet when it is taken off and put on frequently.
