Your dawn patrol cycling sessions start before the sunrise and end in the middle of the day, and the Uvex Sportstyle 810 V Photochromic Sunglasses provide the right tint throughout. That's because Variomatic makes the lenses adapt from dark to bright conditions by tinting from clear to shaded according the brightness around you. These Polavision lenses filter 100% UV ray protection, and their ten base curvature wraps around your face more for better coverage. Uves decentered each lens for a distortion free view, and direct lens ventilation works with the Supravision anti fog coating to keep moisture off the lenses. The soft, adjustable nose and temple pads provide a precise fit that won't slip off from your sweat. 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.