| High-Impact 2.2mm Polycarbonate: Features 2.2mm thick, ballistic-grade polycarbonate lenses (Model 740-0186) specifically engineered for high-velocity impact resistance in the ESS CDI frame. Hi-Def Yellow Low-Light Optics: Engineered to enhance contrast and depth perception in low-light, overcast, or hazy conditions, providing 100% UVA/UVB protection and distortion-free clarity. Lateral Exchange System Compatibility: Precision-cut for the CDI series "Medium Fit" frame, allowing for rapid, tool-free lens interchangeability via the integrated side-loading system. | Military Grade Authentication: Verified with NSN 4240-01-545-7925, ensuring these lenses meet rigorous government standards for durability and optical performance in the field. Technical Replacement Set: Sold as a pair of high-performance replacement lenses for existing CDI frames; please note that the CDI sunglass frame is sold separately. |