Zeb wearing an oxygen mask. Oxygen Masks were essential for deep space travel that might require out-of-ship activity. They could allow one to breathe in a low-oxygen atmosphere, but were not suitable for outer-space use. Appearances Season Two "The Call" (First appearance) Season Three "Ghosts of Geonosis" This article is a stub. You can help Star Wars Rebels Wiki by expanding it. Retrieved from "https://starwarsrebels.fandom.com/wiki/Oxygen_Mask?oldid=71637" Categories: Article stubs Technology Community content is available under CC-BY-SA unless otherwise noted.