Before installation： Strong ultraviolet rays can damage the dashboard of the car, and strong light can increase the temperature inside the car. During driving, the sun shines on the windshield and reflects it, affecting the driver's field of view and increasing the risk of driving. After installation： The windshield no longer reflects light, but absorbs it and giving you a clear view while driving. Because it is a black material that can absorb light, the temperature inside the car drops. Since the back is non-slip, the product will not move while driving. Protect the instrument panel from ultraviolet radiation, not easy to crack, discoloration.