Airvida Elite 1.3-2.0 ATA TEST PAGEHard Sitting Hyperbaric Chamber elite HARD SHELL TYPE, SITTING DESIGN The 1. 5ATA and 2. 0ATA hard sitting hyperbaric oxygen chamber is a hard shell hyperbaric chamber designed for people to sit down inside, and it is also possible to recline comfortably with a premium folding sitting chair. All Airvida Chambers come with an Adjustable ATA valve to choose between 1. 4,1. 6,1. 8, and 2. 0