this is an innovation.yijia auto sunshade is a new style sunshade product different from other common ones.it is fixed on the roof of your beloved car,and it covers over your whole car,including front,back,and sides.it is also burglarproof,there is a special device that can prevent the sunshade from being stolen.it can reduce sunlight heat effectively.it also has another big advantage.you can put any advertisements you like on it,so wherever your car is parked,it always becomes to be focus.