The principle of riding helmet is to play a protective role by absorbing the impact force of collision. In other words, every riding helmet has a foam inner layer. In case of an accident, the foam inner layer will cushion the collision to reduce the accident damage. Traditionally, many riding helmets are made of EPS (expanded polystyrene) materials. Once EPS foam is crushed and deformed in an accident, it cannot be recovered and reused.

Cycling helmet - the most solid protective barrier for life in cycling. Falls in the process of riding will cause great damage to the head. Even if the cyclist is riding along the bicycle lane with stable slope at a lower speed, the safety problem cannot be ignored.