Use Oxford cloth, durable and easy to clean。The inner Aluminum foil film material enhances heat preservation and cold preservation, and keeps food fresh and delicious.Use: Lunch box, freezing food,fruit and drinks Keep fresh, ice or thermal insulation , Medicine storage . Suitable for: Holiday travel, Field trips, Picnic, Office workers, Students to school.Feature: Easy to carry, use, and clean. Description:Item: Cooler BagsMaterial:Outer layer: Waterproof NylonMiddle: 3.5MM EPE Insulation CottonInner layer: Environmental ProtectionSize: 26.6*20.3*24cm / 10.47*7.99*9.44inPackage Included:1 PC x Cool Bag BackpackNOTE:1.As a result of manual measurement, please allow 1-2cm error.2.Due to the different lighting during the shooting, the picture color is slightly different from the actual product.