Solar heat reaches your Tesla as visible light, ultraviolet and infrared. Infrared is the invisible part people notice most, because it is what makes a cabin feel like an oven after a few hours in a parking lot, and a dark film alone doesn't necessarily deal with it. Kepler's nano-ceramic construction is engineered to work across that spectrum, filtering UV, cutting glare from visible light and rejecting infrared heat, which is why a lighter Kepler shade can still keep a car comfortable. Filtering UV also helps protect seats, dash and trim from fading over time. Ask your installer to compare the exact films and shades so you can see how each option performs before choosing.