Unique design integrated eyewear Easy to install or replace Conveniently flips up or down in service Available in clear or smoke lens for all light levels Approved to:Clear: EN166 1 F T, EN172 2C-1,2, ANSI /ISEA Z87.1 Smoke: EN 166 1 F T, EN172 5-3,1, ANSI /ISEA Z87.1 Clear: S589, Smoke: S589SE