OUR SERVICE: We stick to pay attention to product quality, if there's any quality problems please feel free to contact us. BLUE LIGHT BLOCKING LENSES: Reducing the damage caused by harmful blue light and blocking ultraviolet radiation effectively. It can relieve eye fatigue when you work on computer or look at smartphones. TRENDY TEMPLE DESIGN: Special design of temple, combining metal and plastic, make frame more sturdy and lightness. And the classical pattern on the temple also make it more elegant and trendy. LIGHTWEIGHT MATERIAL: Using high-quality material which has the characteristics of super lightness, abrasion resistance and low friction coefficient. It can effectively prevent the damage to the eyes and face caused by the fracture and friction of the eyeglasses frame in the movement. DIMENSION:Lens width:50MM, Bridge width:19MM, Arm length:144MM. Arm: 144 millimeters. Lens width: 50 millimeters. non-polarized. Composite lens. Plastic frame.