Authentic Oakley SI Ballistic M Frame 2.0 Military Safety Shooting Glasses Kit Includes: Frame, Clear Lens, Gray Lens, Case, Head Strap, Microfiber Bag 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. Shatterproof, scratch-resistant Plutonite polycarbonate lenses can be replaced with other colors and shapes Ellipsoid lens shape eliminates distortion Hammerfang ear stems provide a 3-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 |