complete product description are as following.
3M™ Color Stable Sun Control Films consist of their own patented, Nano-carbon polyester which is non-metalized. This technology allows the films to retain their integrity and never fade to purple. The unique manufacturing process provides for maximum heat rejection while boasting a neutral black color with low reflectivity. Additionally, the films block almost the entire amount of UVA and UVB rays which are the main cause of fading.