If you are looking for reusable face masks to buy, check out all the options on Jane. The prices run from $9 to $14 shipped. And they also have several different varieties. I think I like the ones with the pocket to add a “filter” (a paper towel or coffee filter works).
Check out these options (please note, Jane items usually have a limited day sale- if the ones you are interested in are no longer on the site, you might find something similar but searching the site)
And if you know anyone who is having to wear a mask for a prolonged amount of time, these mask strap bands are supposed to be very helpful for comfort.