SimplyGo Portable Oxygen Concentrator from Phillips Respironics is constructed with high-quality parts and features a rugged, high-impact-resistant design for exceptional durability and longevity. The SimplyGo is designed to withstand impacts, vibrations, and varying temperatures for uncompromising performance — day in and day out. Lightweight at only 8.5 pounds, this O2 device is easy to carry but also has an optional cart for pulling behind you. If you are looking for less weight, consider the Respironics SimplyGo Mini at 3.9 pounds. This manufacturer also offers home oxygen concentrators like the EverFlo and the Millennium M10.