Phifer 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. Our screen fabric absorbs and dissipates up to 70 percent of the sun’s heat and glare before it reaches the window, keeping any room shaded and cooler in the warmer months. SunScreen is easily installed on any type and size of window and also performs as insect screening to keep bugs out.