Look after your eyes with style, comfort and performance. Ultralight, wide field of vision, available in photochromic or category 3, the new R-Light trail sunglasses will protect you from the sun as well as the cold on your next Ultra. Photochromic: These lenses are a type of lens coated with a chemical that causes them to darken in bright light and become normal when in normal surroundings. - Ultralight - 2 lens options: photochromic 1-3 or category 3 blue or orange mirror - Multi-sport - Tough and durable - Adjustable nose - Soft nose and arm for comfort and grip - Water-resistant   - Weight: 27g - Screen width: 155mm - Screen height: 58mm - Nose bridge: 8mm - Arm lenght: 125mm - Photochromic transmission rate: de 17% à 83% - Transmission rate category 3: 15%