Portable oxygen rental: In reality there is no such thing as portable oxygen. It is the equipment like portable oxygen concentrators etc. to which one refers. Those devices are these days for rent in various countries. There are many different brands and models like, AIRSEP FreeStyle, SeQualEclipse 3, Inogen One G2, Philips Respironics EverGo, InvaCare XPO2, DeVilbiss iGo, SimplyGo etc. Please be aware that these sensitive machines can break down easily. To prevent problems one can register for FREE with OxygenWorldwide's S.O.S. Back-up service which arranges alternative oxygen in case of failure.