How to choose the size of helmet

Before choosing a helmet, measure your head shape accurately, and then when choosing a helmet, you need to choose a helmet 2~3cm larger than the head circumference, which is the most comfortable to wear. 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. Helmets are divided into military helmets, police helmets and civilian helmets.

Helmets are mostly semi-circular, mainly composed of 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.

Helmets date back to ancient times. In order to chase wild animals and fight, primitive people used fibers such as coconut shells, armadillo shells and tortoise shells to protect their heads from attacks.

Helmets are used in military, construction, mining and some sports, such as American football, cycling, baseball, skiing, ice hockey, horse racing, equestrian, sports, racing and motorcycles.