Polycarbonate:superior impact resistance,anti-vertigo,all weather,high-definition meets EN166 1B 9 Headgear with high-density polyethylene brow guardeliminates forehead injury completes with 8"x15-1/2"aluminum bound Polycarbonate clear facevisor. Providesprotection against particles, chemical splash dust,heat. Thickness is 0.04" " A-12 and B-12 Aluminum bracket Face Shield Visor