This Reflectix® Double Reflection Insulation lowers heating and cooling costs year-round. Specifications•Used For: Water Heater/ Work Shop/ Wall Exterior/ Radiant Floor/ Storage Building/ Garage Door/ Wine Room•Type: Double Sided Reflective Polyethylene•Length: 10 Feet•Width: 48 Inch•Thickness: 5/16 Inch•Coverage: Cover 40 Square Foot Area Inhibits Condensation. Not Affected By Moisture Or Humidity Resists Growth Of Fungi, Mold & Mildew Non-Toxic / Non-Carcinogenic | Reflectix ® Double Reflective Insulation, 10' x 48"