36" x 100', Charcoal Fiberglass Sunscreen, Replaces Regular Insect Screening & Offers An Easy & Practical Method Of Improving The Energy Efficiency Of Windows & Doors, Specially Woven Exterior Solar Screen That Blocks Up To 70% Of Sun's Heat & Glare Before It Reaches The Glass Surface, Absorbs & Dissipates Sun's Heat & Glare, Easy Installation On Any Tupe Size Window & May Be Removed & Stored If Full Heat Gain Is Wanted, 54 x 18 Mesh.