o2totes Backpack Compatible with Inogen One G3/Backpack With Storage

Makes carrying the condenser much more comfortable than just off the shoulder. Backpack has been very well designed and thought out. For instance, something not mentioned in some of the descriptions is that it includes a removable pad which means that both battery sizes fit snugly. The feet are nice for keeping it off dirty gound, but be sure to get the balance right before letting go.It is most fun to use when you have a friend handy to press the start/stop button for you as othewise you have to take it off (unless you are a contortionist). That's no fault of the backpack though. Very happy with my purchase.