Genesis Pathfinder is a technology demonstration for the inflatable Nautilus space station structure as a prototype for a space hotel by Bigelow Aerospace. Once in Earth orbit, the one-third scale hardware is to produce important data regarding multiple features of a full-scale spacecraft. Genesis 1 will be pressurized with nitrogen, but later units will use an oxygen/nitrogen mixture. Genesis includes also windows and an airlock simulator with key seal interfaces. Genesis is 10 ft×8 ft in size when inflated.