Double Thermal Bubble Roll – Aluminum foil with bubble core, lightweight, waterproof, soundproof, and non-conductive.Heat & Cold Protection: Reflects sunlight in summer and retains heat in winter.Versatile: For insulation, radiator reflectors, or shipping heat-sensitive items.Easy to Install: Cut and stick to any surface. Features: Premium Material - Double thermal bubble roll is made of aluminum foil and combined with durable bubble core, which is lightweight, waterproof, vaporproof, soundproof, blackout and non-conductive. Perfect for car, garage, poultry hutch, pools and heater reflector Heat Protection - Insulation foil bubble wrap reflects the sun and insulates heat. It helps to stay room cool longer in summer, even in strong sunlight Cold Protection - In winter, rooms stay warm longer because the aluminum insulating film helps keep cold outside and helps to keep heat instead of lost it.