Solar energy reaches the cabin as visible light, ultraviolet and infrared. Infrared is the part you feel as heat without seeing it, and on a car with as much glass as a Tesla it makes a real difference to how the interior feels. Kepler's nano-ceramic films are built to reject solar energy across the spectrum, with the ceramic layers doing the work rather than the color of the film. The result is a cabin that heats up less in the sun, less glare through the glass, and ultraviolet protection that helps guard the interior trim. Because performance comes from the film construction, ask your installer to compare the exact film and shade you are considering.