The Inogen One Backpack is the perfect addition for the active oxygen user. It features a mesh shell with vents to ensure the device will not overheat. There are specially designed openings located on the top of the backpack that will allow you to connect AC/DC power cords or cannulas without taking off the backpack.
This comfortable backpack with adjustable straps, has a large custom made department to fit in the G3 safely, and a smaller pocket at the bottom to bring along accessory. The backpack for the G4 is slightly bigger than needed, but it gives you the opportunity to carry accessories and your personal belongings.