BSG-BLACK Matte FRAME PHOTO SUNLIGHTS LENS they change in 30 seconds they are compliant with Safety & Ballistic Standards ANSI Z87.1+ MIL-PRF 31013 Clause 3.5.1.1, Rapid Light changing. Includes (1) extra Yellow Anti-Fog 2.1mm lens for hazy days, Removable Gasket, Strap, Temples, Cleaning Cloth and Carrying Case.

USD PAT. 525,643