Multi-compartment design. Zippered CD/MP3 player pocket with headphone port. Attach gear with monster hook and bottom straps. Hanging accessory pocket. Two side mesh water bottle pockets. Organizer with zippered mesh pocket, pen pockets, and removable key fob. Easy-access media pocket holds various sizes of cell phones, PDAs and MP3 players. Yolk-style, S-Shaped Mesh padded backpack straps with suspension system. Integrated grab handle. Padded back panel and adjustable waist belt. Materials: Mini-Hexagon Ripstop,Waffle Weave, 600-Denier Duralite. Dimensions: 19.5"x 14.5"x 8.25".