Designed to exceed Military specifications for ballistic impact protection, the Wiley X Changeable series features low-profile designs that are NVG compatible. Exceeds ANSI Z87.1-2003 high-velocity impact safety and optical standards. As a leading provider of protective eyewear and ballistic products for the U.S. military, outdoor sports enthusiasts, and the safety and shooting industries, Wiley X Eyewear delivers superior performance and innovative technology every time. Changeable lenses provide all-day protection. Includes: large zipper-top nylon case and T-Peg elastic strap. Fits head sizes: S-L.