Traveling while equipped with this backpack is an absolute must! The shell of the bag is made of 100% polyester 600D and the secondary shell is made of 100% polyester PVC coated. This item has a tricot-lined tablet sleeve for your convenience. Store your books, binders, and files in the large main compartment and enjoy the breathable airflow padded back panel, the dual side mesh beverage pockets, the RFID blocking material on the front side pocket, and the 20l= liter. capacity. Allow this useful tool to get you the attention you deserve!