The main material of the product is high-density Oxford cloth, which is a kind of environmental protection fabric. It has high density, strong cold insulation, light weight, soft and hard texture, and non-toxic. It is called special material for environment. The products can be designed and manufactured according to customers' requirements to fully meet customers' requirements. The closed cover is attached with a rubber zipper. The product is used with ice bags, and the cold insulation effect exceeds the American industry standard.