18 inch Hiking Backpack/Student School Bookbag, Gray Camouflage w/Orange A backpack bag with a black-and-gray camouflage design and bright orange accents. Ample of storage room with multiple compartments and pockets to help organization. The padded, adjustable, and ergonomically S-curved shoulder straps and the padded back panel keep you in comfort throughout the day. Made of polyester. Approximate Dimensions (in inches): Overall - 18 H X 13 W X 8 D; Interior Main Compartment - 18 H X 13 W X 7 D; Interior Top Front Compartment - 4.5 H X 9 W X 1 D; Interior Middle Front Compartment - 12 H X 11 W X 1 D; Interior Bottom Front Compartment - 11H X 10 W X 1 D.