Uvex builds the Sportstyle 710 VM Photochromic Sunglasses burly with adjustable tinting for trail durability that handles changing light conditions. Variomatic technology helps these photochromic lenses automatically adapt to the sun or lack thereof, and they change fast so you can see unexpected turns in time. These innovative lenses are finished with Supravision for fog , water , and oil resistant properties, and Direct Lens Ventilation prevents moisture buildup by pulling cool air in and pushing warm air out. In addition to photchromic tinting, Uvex treats the 710's lenses with Litemirror for infrared ray protection and a mirrored style. Made with polycarbonate, these shock resistant lenses also resist radiation, repelling 100% UVA, UVB, and UVC rays. They have a wider, ten base curvature for better wraparound, more coverage, and a panoramic view, and the soft nose and temple pads adjust for a secure fit. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer andor birth defects or other reproductive harm.