1、Internal Leak Proof: The camping insulated backpack is designed to prevent leakage and adopts hot pressing technology. You can put ice cubes and food that needs to be kept delicious together in the backbag for longer preservation.2、Durable Fabric: The thermal backpack is made of cloth and waterproof lining, which keeps your food at a constant temperature for several hours in a spacious space. The spacious space can easily store everything you need for lunch or picnic.3、Multi Purpose: Adjustable shoulder strap, powerful grab handle, small pocket to help you carry this lunch bag to the office and outdoors.4、Good Workmanship: Smooth zipper, smooth opening and closing, wear resistant and durable, precise stitching treatment, and stronger crossing.5、Large Capacity: Insulated backpack can accommodate fruits, drinks, lunch boxes, mobile phones, wallets, face cream and other daily necessities