ESS CDI Polarized Mirrored Gray Lenses - 740-0319Polarized Mirrored Gray 2. 2mm polycarbonate replacement lenses for the CDI sunglass. These polarized lenses reduce glare and eye strain, in addition to providing 100% UVA UVB protection. CDI replacement lenses are also available in Clear, Smoke Gray, Hi Def Yellow, Mirrored Copper, Mirrored Gray, and Mirrored Silver. The CDI's Lateral Exchange System allows quick lens interchange. Important Note: ESS polarized lenses do not offer the same level of