There are six factors affecting fabric fading:

1. Ultraviolet Light
2. Visible Light
3. Heat and Humidity
4. Chemical Vapors (including ozone)
5. Age of Fabric
6. Dye Fastness

Clear single pane glass (1/8" to 1/4") will reject 23-28% of the ultraviolet light from
the sun. Insulated glass is slightly better, rejecting 36-41%. Window films installed
on glass reject 95-99% of solar ultraviolet light.

Different types of clear glass and window systems will reject 13-29% of the solar
heat. With window films, 80% solar heat rejection can be obtained.

No window film can eliminate fading. It can, however, offer maximum protection
from fading due to solar ultraviolet light and solar heat.