TYR Elite Convoy Transition Backpack Reservoir Included: no Hydration Compatible: no Dimensions: 30 x 15 x 15 in Pockets: [internal] 3 open compartments, [internal] 9 zippered, [external] 3 zippered, [external] helmet carrier, [external] 2 water bottle, [external] cell phone Material: [helmet carrier] stretch mesh, [backpack] nylon