Polarized Replacement Sunglasses Lenses for Oakley Flak Jacket XLJ with UV Protection(Grey) Made of premium quality, polarized and 100% UV protection; Precison Cut to fit with the original Oakley Flak Jacket XLJ frame extremely seamless; Optional mirror coatings design , optimize light for specific environment and activities; Reduces glare and Impact Resistant; Suitable for cycling, running, driving and other out-door sports and activities.