6 PCS Car Window Glass Sunshade Kit, Reflective Sun Blocking & Heat Insulation Shade, Full Coverage Privacy Protection Shield, Foldable Cover for Most Cars Trucks Vans (Silver). Sunshield: This windshield sun shade blocks sunlight and heat from entering the car, lowering the interior temperature while avoiding direct sunlight, slowing down the aging and fading of the interior and creating more comfortable interior conditions.