V-Kool uses a patented nanotechnology process to embed a metallic coating only a few hundred atoms thick onto an optically clear and durable polyester film. When applied to windows, the product screens out over 90% of infra-red rays, while letting in over 70% of visible light. It cuts out about 98% of UV radiation. Unlike conventional tints, V-Kool is virtually transparent and maintains the clear, low reflective look of glass. It can be applied either as a film or laminated between sheets of glass.