Think of the CDI MAX as the original CDI on steroids.?? With a larger frame, thicker lenses and a whole lot more attitude, this is the ultimate sunglass for those who live life to the max.??The extra-tough 2.4mm lenses are some of the thickest of any sunglass in the world, and with maximum lens wrap 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 Z87.1-2010, CE EN 166, and U.S. Federal OSHA. All CDI MAX lenses provide 100% UVA/UVB protection.