BAFSP-515500 Aluma-Foil Super Plus Radiant Barrier, 51-Inches x 117.6-Linear Feet (500 Square Feet) Reflects up to 97-Percent of the radiant heat that strikes it No other energy savings product can do so much, for so little cost; Expect an immediate return on your investment Installs easily; No special tools required Adds noticeable feeling of comfort to your home Installed in attic will dramatically reduce the heat gain in home; Enables reduced cooling load