BDF's Near Complete Transparency Nano Layered window film adds heat rejection and good IR blocking functions to the window while still letting a lot of light through. Containing a subtle blue color, the ULS75 is our MOST clear film and has a lower level of reflectivity than all of the other heat control films, allowing the window to both have a vivid sight of the outdoors from inside and retain a view of the interior from outside. Therefore, the ULS75 can keep the interior cooler without significant changes to the appearance of the window, and the tint is a great choice in places where privacy is not needed but some heat rejection is desired. The 3 mil thick film also blocks nearly all of the UV rays coming in from outside, which helps protect the interior from harmful effects of UV and reduce fading on furnishings.