A study shows more skin cancer is occurring on the left arm. Why you ask because we drive with our left arm exposed to more harmful UV rays. Did you know that window films stop 99.9% of the UV rays. To put this in perspective that is like installing a sunscreen with an SPF of 200 or higher on your windows. Here is a link that talks about skin cancer and window films.
Now image what that is doing to your furniture at home?