HOW IT WORKS - Reduces up to 94% of heat transfer at your attic door. Save Big on your Utility Bill. PREMIUM QUALITY - extra thick double bubble layer laminated with pure Aluminum Foil on both sides. Made with our signature Heavy Duty Zipper. SAVES MONEY - pay back your investment in a few months, not years. SIMPLE INSTALLATION - Easy to handle and install. ENVIRONMENTALLY FRIENDLY - Non-toxic, non-carcinogenic. R- VALUE -15.40, REFLECTIVE VAUE - 97%. According to the U.S. Department of Energy, attic access door is the weakest link in most homes. Our SmartATTIC insulation kit seals the entry access, improve the HVAC efficiency and stop energy loss thru your attic door. Lower your energy bill and pay back your investment in a few months, not years.