The Reflectix® Double Reflective Insulation consists of two layers of highly reflective film (94% + reflectivity) that are bonded to two tough layers of polyethylene. Two inner layers of insulating bubbles and a center layer of polyethylene provide this easy to handle product with high strength and reliability. Reflectix, HVST1612503, Insulation, Series: HVST, 125 ft Length, 16 in Width, 5/16 in Thickness, 166.25 sq-ft Coverage, -60 to 180 deg F, Polyethylene, Domestic