Polycarbonate:superior impact resistance,anti-vertigo,all weather,high-definition Good chemical resistance meets Z87+EN166 F 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,heatthickness is 0.04" .