3M Thinsulate Climate Control film is a virtually invisible film that is installed to your existing window to add an insulating layer to your windows, resulting in similar benefits to double glazing. It will stop up to 40% of heat loss through your windows in Winter, while rejecting 47% of solar heat energy from the sun in Summer, without any loss of natural light or your views. The added insulation to your glass will reduce your energy bills and enhance your comfort all year round. Like all 3M Window films, Thinsulate also stops 99% of UV radiation, so it will also assist to reduce fading of your home's surfaces.