Mens Large 18 Inch Basic Classic Molle Backpack School Bookbag Daypack Material: 600D Polyester for daily use; PVC interior lining for water resistant protection from the elements; Removable Velcro rubber patch of USA Flag to show patriotism Molle straps on front: easily attach external pouches, ID tags, and other accessories for more storage; Metal D-ring on front for attaching items Excellent storage for books, laptop, files, folders, and accessories: 1 large zippered front pocket, 2 side mesh pockets (fits water bottles), dual zippered main compartment Padded adjustable shoulder straps; Rear padded panel for extra comfort Dimensions: 18 Inches x 13.5 Inches x 7 Inches