Equipped with injection-molded high-impact lens protection, HDOA(R) optics and streamlined frame geometry, O Frame 2.0 Pro M extends style and performance to a mid-sized fit.a Evolution of the original Oakley O Frame gogglea Fit: Mediuma Microbag included for storage and lens cleaninga Discreet frame notches at temples provide compatibility with most prescription eyeweara 40mm adjustable strap with silicone lining for a more secure fita Flexible O MatterA(R) chassis conforms to your face comfortably, even in extreme colda All-day comfort of triple-layer face foam with moisture wicking polar fleece lininga Injection-molded PlutoniteA(R) lens material provides 100% protection against UVA / UVB / UVCa Optically correct Dual Lens with F3 Anti-fog coatinga Meets impact requirements based upon ANSI Z87.1, EN 174, and ISO 18527-1