ELVEX HELIUM-18 / SG 59 Anti-fog Safety Spectacles with distortion-free wrap-around polycarbonate lens, the lightest spectacles on the market that maintains Class 1 optic that weighs only 15 grams. Offers superior peripheral vision and protection with Ergo Fit™ contours temples that follow the shape of and lies flat to your head. Fits well with hearing protectors and other PPE. Temples securely hold the frame in place for better non-slip compliance. Anti-fog lens polycarbonate lens with washable coating absorb 99.9% of harmful UV A, B and C, 180-380nm. Meets ANSI Z87.1-2010+, CE EN-166.