Rock glasses are designed for cyclists looking for protection and lightness. With their enveloping shape, they effectively protect the eyes from the sun, wind and bad weather. The glasses weigh only 27 g., thus offering optimal comfort during your bike rides. The high definition polycarbonate lenses are interchangeable and come with two options: a clear lens for cloudy days (category 0) and a mirrored lens of category 3, 100% anti-UV for sunny days. For permanent comfort whatever the weather conditions, you can opt for the Rock photochromic lens. Available in 6 different colors, the Rock glasses feature an elegant and functional design to meet the needs of the most demanding cyclists. Opt for performance and quality with the Rock Björka cycling glasses.