Helmet is an important tool for motorcycle riding to maintain the head and mitigate collision. And more than 75% of major motorcycle traffic accidents are head injuries caused by not wearing helmets or not wearing helmets correctly. Helmet atmosphere: full helmet and half helmet. Half helmet can be divided into 1/2 helmet and 3/4 helmet. 1/2 helmet body maintenance does not include ears, that is, ears are exposed when wearing. 3/4 helmet body maintenance extends downward to maintain ear full helmets, which are divided into off-road helmets (pull helmets), faceless helmets and ordinary full helmets. Ordinary full helmets can basically be applied to most knights, especially motorcycle and sports car enthusiasts, because ordinary full helmets are relatively good at encirclement. The helmet is more suitable for motorcycle riders who travel long distances, because it can only lift the front part, which is convenient for drinking, smoking, chatting, etc. It is not necessary to take off the entire helmet frequently. The off-road helmet is certainly suitable for off-road riders, because its lengthened mouth protector can better protect the face and mouth of riders. Half helmets are only suitable for riding cruise motorcycles with small displacement or slow speed. Helmets are made of carbon fiber, fiberglass, organic plastic and rare small steel helmets. Because carbon fiber integrates comfort, lightweight and safety, although the price is relatively high, many knights still buy and wear it. The oversized helmet is very risky for the rider, and no matter what type of helmet you wear, you must wear a safety rope.

Helmet liner refers to the internal buffer layer, whose main function is to absorb the impact of external impact. If the hard helmet shell does not have a buffer layer, when encountering external impact, the impact force will directly act on the dry head through the hard shell, causing damage to the head. Therefore, the cushion capacity of the helmet is determined by the material of the liner buffer layer. Generally, EPS (buffered styrofoam) plastic foam is used as the inner buffer layer, which can effectively dissipate the shock wave generated by impact to a large extent through the foam density of EPS's own material while buffering, absorbing and dispersing the impact force. For EPS plastic foam material, the better the rubber quality between particles, the better the impact resistance after hair holding. Some well-known brands will also use multi-stage foam density EPS according to the different impact parts in the helmet, and every helmet under the Japanese brand SHOEI will use this method.

Helmet pads are generally nylon pads made of foam plastics, which have a good shock absorption effect. Some high-quality helmets also use leather materials (leather has a good softness and fireproof effect). Whether foam pads, cotton pads, or leather pads are used, the main purpose is to provide a softer and more comfortable touch, and have sweat absorption, quick drying Antibacterial, removable, clean and breathable. Of course, the more breathable the helmet is, the more breathable and cool it will feel when worn.

The buckle and headband accessories (safety harness) of the helmet are mainly used to fix the position of the helmet. The headband is fixed below the two ears, and the buckle is fixed at the throat knot. The air hole of the helmet is designed to help the head to dissipate heat and ventilate, and keep the hair dry and cool during long driving; The knob can adjust the tightness of the helmet according to the size of each person's head. Some high-end brand helmets are also equipped with various attached convenient devices, such as vent devices, face shields, ear protection devices, intercom devices, etc