Photochromic cycling glasses R2 Factor * sun filter category: 0-3 * certification: CE EN 174: 2001 * weight: 20 g * photochromic technology - darkens and lightens depending on the intensity of ultraviolet radiation (with a higher incidence of radiation, the lens darkens and vice versa automatically brightens at lower light intensity) * lens material: photochromic impact-resistant polycarbonate * frame material: light and extremely flexible Grilamid TR90 (extremely light and yet very durable high-tec material with above-average flexibility and shape memory, increased wearing comfort) * lens color : brown to brown with gold mirror finish * 100% UV protection A,B,C * adjustable beam, glasses can be adapted to almost any type of nose * frame dimensions: 135-0-139 * anti-slip and adjustable beams and side ends improve stability of the glasses and prevent slipping * compatible with Pro Optic * included in the package is a cloth bag made of microfiber, which also serves as a cloth for the glasses and a strong case for the glasses * bicycle glasses, sports glasses