Littlebird4 Replacement Sunglasses Lenses Compatible with Oakley Crankshaft Polarized with UV Protection-Emerald Green 1.One pair of Emerald Green replacement lenses; 2.100% polarized , reduces glare and enhances contrast,and provide 100% UV protection; 3.Precision cut to fit your Oakley Crankshaft frame perfectly only, please confirm your model before placing orders; 4. Impact Resistant: Meets ANSI Z80.3, ISO 12312-1:2013, and AS/NZS 1067:2003 standards & ANSI Z87.1 high mass, high velocity impact standards; 5.Water,sweat,oil and dust resistant.