High Performance Face Shield WindowWraparound face shield window is constructed from sturdy, injection-molded propionate to withstand the most demanding work conditions. Specifically tailored to fit crown protector for a more effective seal against airborne dust, dirt and light debris. Specially angled shapes allow freer head and body movement. 50% thicker than conventional .040" windows for more protection. Will fit comfortably over other protective equipment such as respirators and safety eyewear. Safety Headgear Accessory Type: Face Shield; For Use With: Fibre-Metal® F300 Series Face shield Assembly.