This insulated lunch box is made of thickened PE, aluminum foil, tin foil, and pearl cotton, providing excellent insulation and cooling effects. The size of the lunch bag is 18cm*18cm*25cm/length*wide*high. It is easy to use and can be used to preserve food during camping and picnics. The waterproof oxford cloth makes it easy to clean. Package includes 1 piece insulated thermal cooler bag.