The unique heatblock sunshade impedes sunlight and also repels heat to keep the inside of the car cool and comfortable the exclusive diono design features a tightly woven material with a light and heat reflective coating to ensure car passengers will be protected from uva and uvb rays with the upf 50 material the super lightweight blind is easy to pull down and retract back with a one button rewind the heatblock sunshade easily attaches to the window with strong suction cups measures