I. lightweight， minimizing the weight of the package itself

II. Collapsible storage， small size after folding up the mountain during mountaineering bag can be placed in a large， easy to carry.

Three .25 liters of capacity， bearing 5 kg， can be put down a certain amount of drinks， warm clothing， life preserver.

Four double zipper opening， inside: a document pocket， no zipper. Outside: a zipper pocket， two side pocket bags.

V. nylon， a certain waterproof， tear-resistant fabrics more solid.

VI. Shoulders can bear， completely hands free.