Oxygen therapy users share how having an oxygen tank can be a burden that restricts them from leaving home for extended periods of time. Actor, William Shatner, shares how a close friend of his passed away from COPD and how he saw first hand how hard it is to struggle to breathe. Inogen says it is time to reclaim your independence with the Inogen One portable oxygen concentrator. The Inogen One produces its own oxygen so that users don't have to lug around a tank. Users share that they got their freedom back.