Inogen, Inc. manufactures compact, lightweight, and travel-approved portable oxygen concentrators designed to free patients from heavy tanks, managing tank refills or being tethered to stationary systems. The Inogen One, a single-solution portable oxygen concentrator, is small, lightweight, quiet, energy-efficient, and very easy to use at home or traveling. This next-generation product family has changed oxygen therapy greatly. Whereas many patients needed multiple devices for different uses, the Inogen One Portable Oxygen Concentrator offers an all-in-one solution that has helped countless oxygen therapy patients reclaim their independence, freedom, and quality of life. For stationary oxygen therapy, the Inogen At Home is one of the lightest, quietest, and most energy-efficient 5 liter per minute continuous flow home oxygen concentrators on the market today. It delivers the familiarity of continuous flow oxygen in an unparalleled small, compact, and lightweight design.