I've seen people going into stores with bandanas pulled over their noses like the Frito Bandito. I read somewhere that they aren't as effective as a mask.
What sort of mask are they not as effective as? N95, no. Surgical masks used to protect agains droplets, splashes and sprays, perhaps.
I've been seeing people with face shields, no mask. Might be fine, because they also protect against droplets, splashes and sprays.
I don't like the stuffy feeling of masks. When I worked in the OR, the masks were not stuffy because the temperature is kept lower except for one room type. I'm glad I don't have to work 8 hours with one on in a warm place.