More capacity for long days in the mountains. The UD Mountain Vest 6.0 boasts 13.5L of storage volume featuring a rear weather resistant main pocket with clamshell opening and large rear compartment spacious enough for a 2L reservoir. Rear zippered lat pockets are accessible while running. On the front of the body, users will enjoy several pockets, including a zippered weather resistant pocket for a phone. Also, pockets for two (included) Body Bottle 500's.