A jingle associated with a helmet.

Wearing a helmet on a hot day is not a loss, but riding a motorcycle is risky. Every time you go on the road, you should think about your own safety. Don't take advantage of it and save trouble. Don't be too troublesome and afraid of burdensome. I wish motorcyclists all over the world a safe home every day!

Helmet is a device to protect the head, a hat worn by soldiers in training and fighting, and an indispensable tool in people's traffic. It is mostly semicircular and mainly consists of three parts: shell, lining and suspension device. The shell is made of special steel, glass fiber reinforced plastic, reinforced plastic, leather, nylon and other materials to prevent the head from being damaged by hitting objects such as warheads and shrapnel. In ancient China, it was called Zhou, Shoufu, Tofu or.

Modern helmet is mainly composed of helmet shell, lining and suspension system. Due to the different requirements of various activities, the structure and style of helmets are also diverse. Usually, the shell of helmet is made of high-strength materials, such as metal, engineering plastics, Kevlar fiber and so on. , most of the impact force is absorbed through its deformation; The lining material has the functions of absorbing sweat, keeping warm and damping, while military helmets often have the functions of further slowing down the impact force and preventing the head from being injured by shell fragments. The suspension system is the part between the shell and the lining, which can usually be adjusted to meet the differences of different wearers' heads.