Single Bubble Reflective Insulation (White/Foil) 6'x125' - 750 sq ftEcoFoil Single Bubble Foil Insulation is designed to improve comfort and reduce moisture issues in moderate climate structures such as pole barns, metal buildings, basements, crawl spaces, and storage areas. A single layer of polyethylene bubbles creates a built in air gap that helps limit heat transfer and reduces condensation caused by temperature differences on either side of the material. At approximately 1 8" thick, it is lightweight, easy to