Lean back in a plush leather chair, pay cold cash and breathe pure oxygen.

That’s a deal increasing numbers of people are lapping up in the eastern Indian city of Calcutta as they struggle to cope with the metropolis’s foul air.

Cashing in on rising concerns about air pollution, two brothers have started Calcutta’s first oxygen parlor, where customers can sink back in soft leather chairs, inhale oxygen flavored with various scents and be lulled by soothing music.