Serengeti Giustina Sunglasses, Crystal Wine Frame, Polar PhD CPG Lens Photochromic lenses constantly adjust to changing light conditions Spectral Control diminishes haze and distracting glare, enhances contrast and sharpens your vision Polarized - parallel light rays can enter, while distracting perpendicular rays are absorbed 100% UVA/UVB Protectant, Trivex Lenses Trivex Frame Front/Stainless Steel Temples and Adjustable Nose Pads