Sunglasses Polarized Lenses Replacement for Oakley Crankshaft (OO9239) Sunglasses Black Iridium Mirror Coatings It offers 100% UV protection & 100% polarized, easy to install Precison cut and guaranteed to fit with the original Oakley Crankshaft frame extremely seamless Water, sweat, oil and dust resistant Reduces glare and enhances contrast perfectly Optional mirror coatings optimize usable light for specific enviroment and activities