The Oakley SI M Frame surpasses ANSI Z87.1 Industrial Standards for high-mass and high-velocity impact protection. Incorporating High Definition Optics (HDO) technology, lens geometry comes in five interchangeable lens shapes. All lenses are made of pure Plutonite, a proprietary material that offers the highest level of optical clarity available in eyewear. You get razor-sharp clarity at all angles of view, which maximizes peripheral vision and protection against sun, wind and side impact.

Features of Oakley SI M-Frame Strike

• Shatterproof, scratch-resistant Plutonite polycarbonate lenses can be replaced with other colors and shapes, sold separately
• Polar Ellipsoid lens shape eliminates distortion
• Hammerfang ear stems provide a three-point fit to comfortably accommodate various head sizes
• Patented hydrophilic silicone earsocks and nosepieces become tacky when wet, so they won't slip down when you perspire Lens Descriptions Clear Lens - All-purpose. Allows the maximum amount of light through for the most accurate representation of your environment
• Amber Polarized Lens - Medium to bright light. Excellent all-purpose lens that cuts blinding glare while boosting contrast and depth perception
• Black Iridium Lens - Extremely bright light. Comfortable lens tint that offers truer color perception
• Gray Lens - Medium to bright light. Excellent all-purpose lens with enhanced contrast for sunny conditions
• Gray Polarized Lens - Medium to bright light. Excellent all-purpose lens that cuts blinding glare while offering truer color perception
• VR28 Lens - Medium to bright light. Filters blue light to increase contrast and improve depth perception in a wide variety of conditions.