Modern large lens size and design with a touch of retro styling - the Density is the right choice for those who appreciate both looks and top notch optical quality. Julbo's photochromic lenses react to UV light, and are not affected by temperature. - Fast adaption to quickly changing conditions with the 135 x 59 mm Reactiv High Contrast lens, suitable for practically all cycling conditions apart from night riding - Contrast-enhancing mirror finish - Visible light transmission 17 ... 75% - Wide field of view - Flexible nose pad - Temples are 138 mm long, with a pleasant material, easy to form for a perfect fit - Weight: incredibly low, at 20 grams Julbo has been making sunglasses for more than 135 years. By buying Julbo, you are investing in a quality product and can rest assured the glasses offer perfect UV protection.