... moisture economy SpecificationsCharacteristics:No odor and to xicity, environmentally-friendly;Light, soft, dustfree, fire, retardant, easy to install;Heat reflection, ... top layer is PE coating, the middle layers are aluminum foil (honed side), and PE, and the bottom layer is ... extruded down and coated evenly into the middle of aluminum foil and woven fabric. These 4 layers are pressed tightly and ...