WHY SHOULD I CHOOSE THIS PRODUCT? Windowsox is one of the greatest sun shade products on the market that offers more than just protection against the scorching sun. This patented design is the answer to the demand for a long overdue improvement to the traditional car window shade products. WindowSox is sold in sets of two. WindowSox absorbs over 80% of the suns harmful UV rays while letting light through. WindowSox is only available for the rear windows. Unlike some of the traditional shades, Window sox covers the entire window and allows you to open the window without having to remove the shade first. Unlike Window sox, the traditional roller blinds held by a suction cup does not cover the entire window and prevents the window from being opened. Window Sox allows you to open the window with the flexibility of removing the Window Sox when you don’t need to use it. Tinted windows can be very expensive and is a permanent fixture. It affects your outward visibility and by opening the windows, you defeat the purpose of offering shade to the passengers. This innovative product (Window Sox) is designed to fit over the window frame of the rear doors offering protection from the sun whether the window is open or closed. Window Sox does not block your outward visibility while allowing fresh air into the car. Once the Window Sox is installed, it can be removed and re-installed within seconds. Window Sox covers a wide range of vehicles and was designed for specific models to ensure a snug fit covering the entire window and prevents flapping noises. Window Sox is ideal for children and babies seated in the rear of the vehicle, shielding them from the sun.