Reflects 95% of Radiant Heat - attic stair cover is made of double bubble reflective radiant barrier - so it is light weight, thin and effective. Provide Air Seal - This insulation cover is designed for optimal efficiency. Our insulation cover works year around, on hot summers and cold , helps to keep your valuable heated and cooled air in your living space where you want it. The attic tent also prevents air leakage, dust and pollutants from in your home, helps keep your house clean and improves your indoor air quality. Easy Zipper Access To Attic - This stairs insulation cover uses heavy-duty zippers to allow easy access to the attic which are enough to withstand repeated openings and closings, easy to get in and out. When you are trying to enter the attic, just open the zippers and fold the cover over. Note - Measure the opening to determine the required size of a cover kit. Carefully measure the inside and outside dimensions as well as the height requirements of your attic stairs. Cover size: 25x54x11 inch. Installs in Minutes - Installs Inside Rough Staircase Frame, it takes like 5 minutes to install using a staple , just stapling along the black seam binding. (Staple not included), Weight: 1.16624536598 pounds, Manufacturer: Prterver