OAKLEY SI: Oakley SI was created to improve the safety, performance and comfort of our customers and safety professionals. They offer the ultimate optical clarity and protection in combat ready equipment for those whose lives depend on their gear.PATENTED HIGH DEFINITION OPTICS (HDO): Oakley's HDO lenses provide optical clarity and razor-sharp vision 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 BLACK LENSES: Prizm lenses are designed to enhance color, contrast and detail. 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.STRESS RESISTANT FRAMES: Lightweight and durable for all-day comfort and protection, these frames are injected with molded thermoplastic O-Matter for improved strength and flexibility that's designed to withstand shifting or deforming over time.VISIT THE OAKLEY BRAND STORE: Click on the Oakley link above the product title to shop the entire assortment.