ESS TACTICAL-XT. The Tactical XT is a high-performance, economical goggle designed specifically for tactical operations. The 2.6mm high-impact lenses provide dependable impact protection, and the40mm strap has slides for easy strap adjustment. The roomyStriker frame is designed to fit overmost eyeglasses. Safety Standards:ThisTactical XTgoggle is compliant with U.S. MIL SPEC MIL-PRF-32432, ANSI Z87.1?2015, CE EN 166 and U.S. Federal OSHA. AllStrikerSerieslenses provide 100% UVA/UVB protection and distortion-free optical clarity.