ReVive Optics 5SQ3-P-M-BL Replacement Lens For Oakley Fives Squared (Polarized Blue Mirror) One pair of replacement lenses in Polarized Blue Mirror for Oakley Fives Squared Sunglass cleaning/storage bag included 100 percent Polarized lenses reduces glare, enhance contrast, and provide 100 percent UV protection 18 percent light transmission Impact resistant exceeds ANSI Z80.3 and EN 1836:2005 standards