Lightweight & breathable: (only 0.5lbs)made with lightweight polyester materials for durabuility.excellent air ventilation system consist of mesh back and adjustable wide mesh shoulder straps,prevents stuffiness and distributes weight effectively.and flexible sternum straps reduce strength consumption. large capacity: features on a mian compatment storing max. 2l water bladder(not included),a front open pocket,two side drawstring pockets and two small side zipper pockets. the products are affordable and cost-effective. made of high quality material, it has good performance.
