Atmosphere maskCanonLegendsInfinitiesAn atmosphere mask was a piece of mining safety equipment used in spice mines. Leia Organa donated a number of atmosphere masks to the workers in the mine on Onoam. AppearancesLeia, Princess of Alderaan (First appearance, simultaneous with Leia, Princess of Alderaan audiobook) (Unknown)Unknown UnknownNoneLeia, Princess of Alderaan audiobook (Unknown)Unknown UnknownNone