This small accessory provides your child with optimal protection from the sun during short and long car rides. Easily and quickly pulled over an open rear car door, the black Window Sock protects against direct sunlight and heat. Another advantage is that the window can be opened and closed while driving without having to remove the window sock, as it is pulled over the entire car door and not directly over the window. Self-adhesive Velcro fasteners are included for additional support. When the window is open, this sunshade also protects against unwanted guests like mosquitoes. Universal size suitable for car doors. Material: Polyester plus elastane (stretch material), easy to put on like a sock.