These extra-tough Clear replacement lenses for the CDI MAX sunglass are some of the thickest of any sunglass in the world. Built from 2.4mm high-impact polycarbonate, you'll be more covered than ever before. Similar to the battlefield-proven CDI, the CDI MAX features the ESS Lateral Exchange System, allowing you to quickly adapt to your environment by interchanging any of the five available lens colors. Medium-Large Fit. Compliant with U.S. MIL SPEC MIL-PRF-31013 (Clause 3.5.1.1), ANSI Z87.1?2015, CE EN 166, and U.S. Federal OSHA. All CDI MAX lenses provide 100% UVA/UVB protection. Medium-Large fit.