Phifer Wire 48 in. W X 100 ft. L Charcoal Fiberglass Sun Screen ClothPhifer SunScreen is woven vinyl coated fiberglass screening manufactured for the primary use of reducing solar heat gain in the summer and reducing heat loss in winter. SunScreen absorbs and dissipates up to 70 percent of the sun's heat and glare before it reaches the window. SunScreen is easily installed on any type and size of window and also performs as an insect screening. UPC: 047888055234 Manufacturer Part No: 3003612 Brand Name: Phifer Wire