The original CDI gets an upgrade with the all-new ESS CDI Max Terrain Tan Sunglasses with Interchangeable Lenses. CDI Max Terrain Sunglasses are designed for those who live life to the max, featuring a larger frame and thicker 2.4mm lenses meet or exceed Mil-Spec, ANSI, CE, and OSHA standards. Best of all, Tan CDI Terrain Max Sunglasses have maximum lens wrap for maximum coverage, while the ESS Lateral Exchange System allows you to quickly adapt to any environment.