What style mask have you been using:  Stylish thin neoprene, cheap blue disposable, N95, bandana,  other?

An old Soviet NCB mask and respirator.

Hand-sewn out of cotton quilting fabric.

The cheapest I can get away with. I don't think healthy people need them.

I use N95 and R95 masks. Fortunately I had a stock of N95s in the first aid kits and R95s in the tool box before the pandemic took hold. After using one I disinfect it in an ozone-based machine. I also rotate usage so there is at least a week or two before I reuse a mask.

Cheap blue disposable. Although less effective than N95 unvalved masks, they are more effective than some others shown. People are having trouble understanding the reasons for masks. 

Sick people should not be out at all.

People who are pre-symptomatic, as infected but not showing symptoms, are often big spreaders of Covid-19. They MUST wear a mask to prevent their virus from spreading to other people. BUT, people without symptoms don't know whether they are infected. Few people are getting tests every three days. Those people can skip the mask if they wish.

The mask protects others from YOUR infection. A medical study rated effectiveness.

https://www.aarp.org/health/conditions-treatments/... 

There are no exempt people. They must remain isolated. When I see someone without a mask, I ask when were you tested negative for Covid-19? 

A test with a 5 day results delay is worthless.

None of the above, I am exempt.

@ A.J, yes, there are exempt people, when I have to attend hospital, I am exempt from wearing a mask. There is an exemption card, that can be downloaded for asthmatics and others with respiratory and/or heart disease. I show it at shops, supermarkets and they understand that I am exempt and I am allowed in.

An N95 mask for personal protection because I have risk factors. I'm considering getting an N99 for high risk situations.