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# Oxygen Mask
Due to rolling 02 droughts, intermittent breathing challenges can be a common occurrence in Mega City, particularly on days of increased industrial activity and high density in the "exhaust layer". Oxygen masks have subsequently been adopted by some citizens as a way of avoiding potential low-oxygen obstructions.
Rainor Medical currently maintains a monopoly over the oxygen apparatus market, having achieved dominance with their oxygen subscription model. "Pocket Ox" lets subscribers allocate 02 quantities to their Rainor oxygen app, which is then engaged with the device itself to activate 02 delivery and billing.
**Associated Brand:** Rainor Medical
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