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 youll be more covered than ever before. Similar to the battlefield-proven CDI, the CDI MAX features the ESS Lateral Exchange System, allowing you toquickly adapt to your environment by interchanging any of the five available lens colors. Compliant with U.S. MIL SPEC MIL-PRF-31013 (Clause 3.5.1.1), ANSI Z87.1-2015, CE, and U.S. Federal OSHA. All CDI MAX lenses provide 100% UVA/UVB protection. Medium-Large fit.