outdoor round kettle package600d high strength nylon fabric, tear releasetemperature resistant, durabletwo storage spaces,a main large one and a small one,suitable for most water bottleslarge pocket size(h x dia): 27*10cmsmall pocket size(l x w x h): 16 * 3 * 3cmmolle system which can be used with big bag, backpack or belthang rings on the side for hanging other itemsadjustable and detachable back beltvery convenient and useful for outdoor exercise such as hiking, camping, war games