3M Crystalline Automotive Window Tint combines elegant looks with unmatched performance, rejecting more heat than most darker films. With patented multilayer nano-technology optical film that rejects up to 64% of total incoming solar energy. This unique film allows in natural light while blocking up to 99% of the sun’s infrared rays, the heat you feel from the sun. Crystalline is designed to reject maximum heat while maintaining the existing look of your vehicle.