Revant Vented Replacement Lenses for Oakley Flak Jacket XLJ Asian Fit 4 Pair Combo Pack K021 Mirrored Revant Exclusive vented design  precision cut and guaranteed to fit your Oakley Flak Jacket XLJ Vented 4 combo pack Titanium MirrorShield&reg; lenses & Stealth Black Polarized lenses reduce glare, enhance contrast, and provide 100% UV protection Impact resistant (exceeds ANSI Z80.3 and EN 1836:2005 standards) 365-day manufacturing warranty and 60-day money-back guarantee