1680D, 100% ballistic nylon bonded to a waterproof membrane; Padded laptop compartment fits up to 17" laptop; Interior pocket with key clip and zipper closure; Two interior slip pockets; Roll top closure with adjustable straps and side release plastic fasteners; Sturdy top grab handle; Large exterior flap pocket with hook and loop closure; Exterior pocket on flap with zipper closure; Side-entry security pocket with zipper closure at wearer's back left; Secure mesh water bottle pockets; Adjustable padded straps; Comfort mesh padded back, sturdy padded bottom ; 15.5"H x 11"W x 4.5"D; Capacity: 12.6L