The 3M™ Aluminized Polycarbonate Face shield Window helps protect against impact and heat in high temperature applications. With an easy-pivot assembly and extra thickness, it is great for bright, high heat furnace operations. 3M™ Aluminized Polycarbonate Face shield Window helps protect against impact and heat in high-temperature applications. With an easy-pivot assembly and extra thickness, it is great for bright, high-heat furnace operations. 3M™ Faceshield Window, Dark Green, Aluminized Polycarbonate, 0.8 in Visor Thickness, For Use With: 3M™ Headgear Systems, Specifications Met: ANSI Z87.1