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What material is used in cooler bags
Insulated bags usually contain an outer layer made of a tough plastic fabric like vinyl, nylon or polyester that can be hard to stain or tear. The bag's inner layer is usually made from a water-resistant material – plastic, aluminum, vinyl and foil liners are common and help keep food fresh and dry.
The holding time of the cooler bags
The insulation time of the cooler bags is generally between two and three hours. Due to the different materials used in the production of the insulation bag and the different environment used, the insulation effect will be slightly different.
Therefore, during some bad weather, many people will add additional accessories to it, such as fresh products with extra ice packs. Sometimes there are extra products like warm baby in takeout, which can be heated at constant temperature. The combination of these products and cooler bags can make the insulation effect better.