PERFECT SIZE - 40 x20 Universal fits most vehicles mesh design means you can roll down the windows and see through but wouldn't block your view while enjoying the fresh air . INTELLIGENT DESIGN - Premium quality breathable nylon mesh design light and robust. The stretchable sun protection net protects passengers in the back seat from the effects of temperature and harmful UV rays. DOUBLE PROTECTION - Pediatricians often recommend car window screens to protect children and babies from harmful UV rays. Car window screens use double sun protection to block 98% harmful sunlight and UV rays to keep your babies safe. EASY TO INSTALL FOLDABLE - The practical design allows you to attach them to your rear seat windows in seconds and you can easily fold them into a small size when not in use.