Elvex Go-Specs provide an extra measure of protection in dusty and dirty environments. Additional features and benefits include: High impact resistant molded lens with anti-fog SuperCoat 1.8 mm thick Polycarbonate lens with a base 6 curvature Polyurethane foam seal Angle adjustable temples 99% UV protection for UV A, B and C, 180-380 nm Tested to ANSI Z87 (+) Available in gray (EV402) or clear (EV401) lenses