With an extended peripheral view and helmet-friendly temples that adjust to three different lengths, these sporty, durable sunglasses are a cycling must-have. 131mm lens width; 121mm temple length 100% UV protection Switchlock?interchangeable lens technology ensures fast, secure lens replacement Performance shield lens technology with HDO?Prescription-compatible Unobtainium earsocks and nosepads provide enhanced comfort O Matter?plastic Made in the USA