C70 is one of the main products of amber optics, mainly the nano-ceramic membrane of amber optics. The product has excellent performance: visible light transmittance reaches 7 1%, total heat insulation rate reaches 47%, infrared ray blocking rate reaches 9 1%, and ultraviolet ray blocking rate reaches 99%; But the visible light reflectance is only 10%. It's not the most expensive, but it's one of the best automobile windshield films, so in fact it should be regarded as one of the best solar films.