The Laceto RANGER photochromic sunglasses have a matte black frame with non-slip ends and bridge which form the basis of these great photochromic glasses. The RANGER photochromic glasses adjust their light transmission in response to lighting conditions. If you are in the shade the glasses become beautifully clear, do not limit you in any way and let all the light through. If you are in sunlight, depending on its intensity, the glasses will darken to a transmittance of only 8 - 18% UV radiation, ie. category S3. The RANGER glasses have an adjustable incline on the temples for the most comfortable wear, so everyone can adjust them to their needs.