Black Flys Christian Fletcher Racer Fly Wrap Sunglasses Imported Plastic frame Plastic lens Non-Polarized 100% UV protection coating Lens width: 60 millimeters Lens height: 40 millimeters Bridge: 19 millimeters Arm: 142 millimeters 4" high Black Flys nylon frames are constructed around a wire core, keeping the shape consistent in extreme conditions.They are injected of the highest quality nylon available and feature optical quality polycarbonate lenses.