Constructed with durable 600D Polyester Oxford woven material. Durable heat welded seams. Rugged, wide-mouth zippers provide access to large cargo pocket with more than 9.8 liters of capacity. Foam-padded, fleece-lined laptop pocket. Adjustable shoulder and sternum straps help heavy loads remain comfortable and balanced. Mesh back padding and ventilation channels improve comfort. One external zipper phone pocket and two mesh bottle pockets. Internal main pocket sleeve and hook for keeping water reservoir separate from gear. Durable, easy-to-fill, 3-liter bladder with angle bite valve included. Heavy-duty ITW quick-release buckles.