I can't even tolerate pulling the covers over my head.
For the jerks that won't accept my claim of a medical exemption - and it hasn't happened yet - I carry one of my wife's thongs.
She swears she's never worn it but it is perfumed...
I look pretty good in a Victoria's Secret thong - even when its worn on my face.

My wife wore her mask into a grocery store with me last week.
She has a history of asthma and uses a CPAP machine at night.
After about 5 minutes walking around she got dizzy enough to almost pass out.
I got her to the freezer section, opened the door, and asked her to stick her head in it and breath in dense cold air.
The recovery was almost immediate.
She hasn't worn a mask for any duration since.
* I never say I have a medical condition: I always say that I'm claiming the exemption. They can't legally ask why your claiming it without an ADA fine.