Safety helmet, comprising inner shell fitted with valve for vacuum creation facilitating adjustment to shape of head of user

摘要

The helmet is made of a rigid outer shell (1) and a double walled inner shell (2) filled with a shock absorbing material (3) and provided with ventilation openings (8). The inner shell (2) can be precisely adjusted to the shape of the head of the user by creating a vacuum inside. The air present in the space between the two layers (2) can be removed through a valve (6) while the user wears the helmet, facilitating a perfect individual fit.