These Elvex Go-Specs II Safety Glasses protect your eyes with closed-cell polyurethane foam that helps seal out potentially harmful windblown particles like sand, cement and chemicals. Glasses feature 2.3mm-thick lens with a 9.5 base curvature (curved more than traditional Go-Specs). Include arms for wear as glasses, plus an adjustable strap for conversion to goggles. Meet ANSI Z87 High Impact. CE EN-166.