600D polyester with PU backing. Fully padded laptop/tablet compartment fits 17" laptop. Zippered front compartment with multiple pocket organiser. Zippered mesh accessory pocket inside main compartment. Two biaxial mesh backed padded quick grab carry handles. Top zippered drop in padded tricot lined MP3 pocket with rubber headphone exit port. Tuck-away adjustable backpack straps are stored behind padded back panel. Padded back integrated panel can slip over wheeled bag handle. Rubber zip end details.