Sunlight reaching your Tesla's glass arrives as visible light, ultraviolet radiation and infrared energy. Infrared is invisible but accounts for much of the warmth you feel building inside a parked car, and it is the part that ordinary dyed tint addresses least. Kepler's nano-ceramic films are engineered to work across that spectrum, filtering ultraviolet light and targeting infrared energy so less solar heat is transmitted into the cabin. The practical effects are a cabin that is more comfortable on bright days, less glare through the glass, and reduced ultraviolet exposure for seats, trim and dash surfaces. Because the performance comes from the ceramic construction rather than how dark the film looks, you can pursue heat control in a light shade as well as a dark one - compare the exact film and shade with your installer to see what each option offers.