Cycling glasses R2 Racer/+2.5 - these sunglasses are fully loaded with functions - they have a small dioptric field (+2.5) in the lower part and they also have a photochromic lens that darkens and lightens depending on the intensity of ultraviolet radiation. * sun filter category: 0-3 * certification: CE EN 174: 2001 * weight: 18 g * 100% protection against UV radiation A,B,C * photochromic technology - darkens and lightens depending on the intensity of ultraviolet radiation (at higher the occurrence of radiation, the lens darkens and, conversely, at lower light intensity it automatically brightens) * BIFOCAL - small dioptric field in the lower part of the lens for better reading, + 2.5 diopters * frame material: Grilamid TR90 - extremely light and very durable high-tech material with excellent flexibility and shape memory, increases wearing comfort * impact-resistant material * lens material: photochromic impact-resistant polycarbonate * adjustable frame: the glasses can be adjusted to almost any type of nose for a perfect fit * non-slip frames and sides * lens color: clear to gray * size : standard * compatible with Pro Optic * optical sizes: 77-15-120 * included in the package is a microfiber fabric cover that can also be used as a cloth for glasses, hard case * sunglasses, sports glasses, bicycle glasses