Age: over 3 years old. The two-in-one design backpack can be used as a lunch bag and laptop backpack. ★INSULATED LUNCH BOX COMPARTMENT: The inner insulation of the lunch backpack is thickened with foam and works together with the Aluminum layer to keep the food warm but also keep cold drinks about 3-5 hours. Allow you to enjoy delicious food at any time. Food container compartment dimension: 12 x 8 x 6 inch (can hold up 10 cans) | ★Lots of Pockets: The front compartment with zipper pockets, pen pockets and card pockets could keep your stuff organized and easier to find it. The left side pocket is for water bottle or umbrella, and the right side pocket is design for facial tissue. The back anti-theft pocket can fit a phone, credit cards or a wallet to protect your important things from being stolen by thieves. The card pocket on the shoulder strap can fit like coins or keys | ★STORAGE SPACE&POCKETS: The main pocket of school backpack is equipped with a separate laptop soft compartment hold 17-inch laptops and 16-inch, 15-inch, 14-inch and 13-inch Macbooks/notebooks. The soft sponge design will protect your laptop. Outside the compartment, a more spacious packing compartment roomy hold an iPad, mouse, charger, binder, books, clothes, etc. Mesh pockets are located on the sides of water bottles and compact umbrellas to keep your belongings organized and easier to find | ★USB PORT &ANTI THEFT DESIGN:With built in USB charger outside and built in charging cable inside,this USB backpack offers you a more convenient way to charge your phone while walking. A luggage strap allows backpack fit on luggage/suitcase, slide over the luggage upright handle tube for easier carrying. With a hidden anti theft pocket on the back protect your valuable items from thieves, please be assured that the use of | ★Durable Material & Multipurpose: Made of waterproof and durable polyester fabric with metal zippers, the large insulated backpack is also a great gift for your teens, girls, sisters, daughters, girlfriends, mother etc. It is suitable for day-to-day use, work, travel, trip, biking, camping, hiking, picnic, beach etc