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 energy 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. 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 which are enough to withstand repeated openings and closings, easy to get in and out. When you are trying to enter , 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) Colour:Silver Material:Aluminum film Size:Unfold 138x64x28cm Package Contents: 1 x Attic Stairs Insulation Cover Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.