Sun/UV Protection Double nylon mesh car window shades, thicker for blocking sun glare and heat, protect back seat baby, family, or passenger from getting sunburned, reducing car temperature. Window Still Roll DownThe window shades for the car are designed to cover the whole exterior window frame without the help of any adhesive, ensuring free window rolling up/down. Plus the breathable mesh, you can enjoy the cool and fresh air inside your car without enduring the sun heat or some foreign objects disturbing