ESS Striker Land Ops Replacement LensesPolycarbonate material constructionOptically Correct100% UVA/UVB protectionExtra thick, 2.6mm, high-impact lensesClearZone™ FlowCoat lens coating for scratch and fog resistance.Impact Resistance, well beyond the ANSI Z87.1Mil-Spec #: MIL STD 662FMPN: 740-0227NSN: 4210-01-492-5725 50-pack - GrayNSN: 4210-01-492-5722 50-pack - ClearImportant Note for U.S. Military Customers: Only Clear and Smoke Gray lenses are approved for use in the U.S. Military.ESS modular technology allows the lenses from all of their ballistic googles to be changed quickly and easily. The replacement lenses are compatible and interchangeable with a number of different goggles. The ESS Striker Land Ops lenses are designed to fit with all Striker™ Series goggles (ESS Flight Deck™, Land Ops™, Vehicle Ops™, and Tactical XT™) and Striketeam™ goggles (ESS Striketeam XTO™, Striketeam SJ™, Striketeam WF™, and X-Tricator™). These ballistic, hi-impact lenses are 2.6mm thick, and coated with ESS' advanced ClearZone™ FlowCoat lens coatings for maximum scratch and fog resistance. They meet U.S. MIL SPEC MIL-DTL-43511D, and have a V50 impact rating of 650 ft/second (.22 caliber), with zero optical distortion.