content: If you take your car seat to the CHP for inspection/installation, they will make you take these off your windows and tell you not to use them. The reason is that they will likely become a projectile in an accident and can injure passengers in the vehicle, including your precious baby. Think about flinging one of these as hard as you can at someone's face or eyes and you get the idea (somewhat) of the damage it can do.A safer alternative are the window cling shades, hmmm can't exactly remember what they are called, but window tinting stuff you can get a Kragen and stick on yourself. It might not look pretty but remember it is only temporary and for the safety of your little one.Besides all that - they don't work that great.