Intro-Tech BM-40 Custom Fit Windshield Sunshade for select BMW Z4 Models, Silver Custom made for over 2000 different automotive windshield applications Multi-layered material with a metalized outer film that reflects harming UV rays that reduces inside temperatures up to 40 degrees Fahrenheit Protects leather seats from becoming hot and cracking as well as keeps steering wheel and shift knob comfortable to the touch Easy to toll up and with an attached Velcro strap makes the item easy to stow Finished with a UV resistant, non-abrasive velour binding