25L Hiking Backpack, 2L water bag color: Cycling mountaineering INOXTO From the description, we can see that the 25L Hiking Backpack comes with a 2L water bag color designed specifically for cycling mountaineering. This combination allows for a comfortable and convenient way to stay hydrated while exploring the great outdoors. With INOXTO, you can trust that your backpack and water bag are built for durability and functionality.