PATENTED HIGH DEFINITION OPTICS (HDO): Oakley's high definition optics provide superior optical clarity and razor-sharp vision at every angle as well as clarity and protection against impact and UV light, filtering 100% of UVA, UVB, UVC, and harmful blue light up to 400mm. OAKLEY PRIZM SAPPHIRE LENSES: These Prizm lenses are designed to enhance color, contrast and detail - coming in a range of color hues to match any style look. The grey tint on these lenses make it perfect to use when there's strong sunlight or intensified light that is reflected off water or snow. O-MATTER STRESS RESISTANT TECHNOLOGY: O-Matter Oakley frames are lightweight and durable for all-day comfort and protection. They're injected with molded thermoplastic O-Matter frame that provides improved strength and flexibility, and is designed to withstand shifting or deforming over time.