High-density impermeable fabric, soft and delicate to the touch, waterproof, dirt-resistant!3 layers of material insulation,Waterproof fabric, voltage aluminum film, thickened pearl cotton, lock the temperature, internal circulation system insulation, fresh and healthier.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.Material: complexsize: 27x18x41cmInner layer: EVAthe way: ShouldersPackage Included::1 Pcs X Cooler 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.Large capacity for continuous cooling.