For Four SeasonsThe double-sided loft cover can be used under hot and cold conditions throughout the year, which can provide you with energy saving and heat preservation throughout the year to achieve the best energy efficiency. Stair Heat ShieldThe double-sided loft cover can create a seal on the attic door to prevent dust or contaminants from entering your home. Easy to InstallZipper opening and closing, easy to install. Simply attach the attic door heat shield to the attic door opening, and staple to the door frame. Double-Sided Loft CoverThe interior is made of high-quality foam aluminum heat insulation material, the product size is about 54*25*11 inches, please measure it well. Waterproof and FlameproofThis loft tent cover reflects 97% of radiant heat and has an R value of 15.5. It is composed of thermal insu lation bubbles and two layers of thick aluminum foil, which is waterproof and flameproof. Specification: Size: about 138*64*28cm/54.33*25.2*11.02in Material: pure aluminum/aluminum+blister/EPE/XPE Reference thickness: about 3mm-5mm Reference aluminum foil thickness: 7-12UM Reference reflectivity: 95-97% Reference thermal resistance: 2.9M*K/W Reference thermal conductivity: 0.0409W/MM*K Reference temperature: -40-100 Packing List: Double-Sided Loft Cover*1 Notes: Due to the lighting effects and shooting angles, there is color difference in the product, please understand. Due to manual measurement, there is a tolerance in the product size.