100% Polyester with PU coating; Black has a camo interior lining; Grey Heather and Cypress Camo have a grey interior lining; Collegiate Navy has a bright blue interior lining;Padded and fleece-lined laptop sleeve; Internal zippered pocket, two water bottle pockets; Two front accessory pockets; Two main compartments keep books and folders organized; Reflective zipper pulls; Flat padded bottom panel; 30 liter, fits up to 15" laptops; 18.125"H x 11.875"W x 8.25"D;