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 cheap things to save trouble, don't be too troublesome and afraid of burdensome, and 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, FRP, reinforced plastic, leather, nylon and other materials to prevent the head from being damaged by warheads, shrapnel and other striking objects. In ancient China, it was called Zhou, Shoufu, Tofu or Fu Tou.

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. And most of the impact force is absorbed through its deformation; The lining material has the functions of sweat absorption, warmth retention and shock absorption, while military helmets often have the functions of further slowing down the impact force and preventing shell fragments from hurting the head. 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.