How can I block odors

Yesterday at the symphony I sat next to someone with multiple forms of body odor. I was suppressing my gag reflect the whole time, even turned completely away from him and breathing through my sleeve. I couldnt enjoy the symphony at all due to his inconsideration for those around him. (Intense foot odor from gym shoes every time he wiggled a toe, musty dirty smelling clothes, and even a room clearing fart except none of us could really leave mid-performance.) I might have a slightly more sensitive nose than others, but I honestly just think there is a portion of today’s society that thinks being unclean is cool - nonconformists, I guess. In any case, it occurred to me halfway through the symphony that I need to carry something for situations like this because they offenders don’t care and it’s ruining my day. I know people in the medical field use minty balms under their masks (like vapo rub or essential oils or whatever their preference is). What other suggestions do you have for me? I would prefer something that can fit it my pocket.