The Inogen One G5 Backpack is an ultra-light and stylish that has a thermoformed shell that provides stability and protection for the concentrator, it is constructed of water-resistant polyester and features an EVA-Protected compartment that holds the unit firmly while protecting it from accidental bumps. This full-size backpack includes a primary compartment to ease movement of the Inogen One G5 and a lower pocket for additional accessories. The Adjustable strap allows comfort and an appropriate fit, and the patient is able to carry the concentrator around without any hindrance.