SecureFit X5000 ventilated safety helmet. - Mountaineering helmet style helmet for exceptional wearer comfort and uncompromising safety - Suspension uses patented Pressure Diffusion technology - 4-point screw-adjustable suspension system allows the helmet to be easily adjusted to the wearer's head - Patented UV indicator helps the wearer know when it is time to replace the helmet due to its excessive wear under the influence of ultraviolet rays - better fit of the helmet to the head, thanks to the possibility of adjusting the height of the harness - compatible with face shields, hearing protectors and other 3M accessories - optional ventilation holes - meets the requirements of EN397 and EN50365