Because I am a hermit essentially, I only use a mask once or twice a week. Will use one tonight. 6"-12" of snow tomorrow. So will be buying milk and eggs.
I have two types. Will be using the black kn95 mask at the local market. I also have the kf94 masks that have only 3 of the filter layers. I use those in Warehouse stores where I have to walk quite a bit. Easier to breathe through.