EXFIL-48 Backpack1680 denier ballistic nylon outer chassis with PVC coating outer shell PVC treated heavy duty bottom and lower side panels resist water and dirt Padded laptop sleeve with elastic retainers in the main compartment Upper exterior compartment features a zipper pouch for keys and incidentals Molded nylon buckles on cinch straps for speedy mounting on sissy bars External straps can be used to add a bedroll, jacket or skateboard to the bag 6 heavy duty, bar