ESS 740-0243: 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 roomy Striker frame is designed to fit overmost eyeglasses. This Tactical XT goggle is compliant with U.S. MIL Spec MIL-PRF-32432, Ansi Z87.1-2015, CE EN 166 and U.S. Federal OSHA. All Striker Series lenses provide 100% UVA/UVB protection and distortion-free optical clarity.