1. Adjust the circumference of the helmet liner to make the head feel a little bound. Try to turn the helmet with both hands, so that it can hardly turn, but it is not uncomfortable. It is advisable to bow your head without tying your forehead and your helmet will not fall off.

2, give priority to protect the forehead, because most of the loss of control and collision are falling forward, the front edge of the helmet should be pressed above the forehead, and the forehead can not be exposed.

3, wearing a helmet must fasten the lower forehead belt, the lower forehead belt must be close to the lower forehead, in order to have a sense of restraint but not feel uncomfortable.