Solar energy reaching your car arrives as visible light, ultraviolet and infrared, and the infrared portion is a major part of what you feel as heat inside the cabin. Kepler's nano-ceramic films are built to manage that energy at the glass, before it warms the interior, while also filtering ultraviolet light that contributes to fading of trim and upholstery. Because the ceramic layers do the heat work, you are not forced into the darkest shade to feel a difference, which is why lighter options in the range are popular with Tesla owners. Performance varies by film and shade, so check the technical data for the exact combination you are considering and discuss it with your installer alongside the glazing already fitted to your car.