Part of Oakleys military-ready Standard Issue series, Oakley SI Ballistic M Frame 3.0 Shooting Specific Sunglasses surpass ANSI Z87.1 Industrial Standards for high-mass and high-velocity impact protection, keeping your eyes protected in the field or on the range. These Oakley SI sunglasses also meet MIL SPEC, MIL-PRF-31013. The shield-style single lens is made of pure Plutonite, a proprietary material that offers the highest level of optical clarity available in eyewear. The single lens is imbued with Prizm technology, which is specially tuned to maximize vision and bring out fine detail in any environment. With these Oakley sunglasses, you get razor-sharp clarity at all angles of view, which maximizes peripheral vision and protection against sun, wind, and side impact. The nylon frames feature a clip that holds the lens and frame together for more secure support. Thin stems enable compatibility with over-ear hearing protection and communication systems, and a Unobtainium nose pad ensures nonslip comfort. Includes electrostatic Microclear bag for cleaning and storage. Large fit. Nonpolarized. Made in USA. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Non-Polarized.