Ideal for cycling, these high-performance sunglasses feature ultra-lightweight frames and a photochromic shield lens to ensure maximum peripheral vision. The temples adjust to three different lengths for helmet compatibility while Switchlock™ technology provides easy lens changing. 131mm lens width; 121mm temple length 100% UV protection Unobtanium® temples and nose pads ensure no-slip grip Fast, secure lens replacement with Switchlock™ interchangeable lens technology Photochromic lens with built-in HDO® techonology automatically adjust to changing UV light exposure O Matter™ Made in Italy