... ,TPU 4.Package:1set/carton O2 chamber1.Basic components: Air chamber, windows(was made by PVC), mattress, pillar, air pump, ... ischemic tissue. The featurures as the following: The safest hyperbaric chamber available.1.15-1.3ATA operating pressure —— suitable for person ... 2-zipper seal facilitates self treatments.Designed for improved airflow through chamber.Priced to be practical and designed to last.