We discussed this in another thread yesterday and here's what I'm going to do. I ordered several neck gaiter buffs and a 20x30 MPR 1500 HVAC filter which will filter out viruses. I'll take the filter material apart and cut into 8" x 5" rectangular pieces. Once the pleats are flattened out, it should result in quite few pieces.
Then I'll turn the neck gaiter inside out and place the filter material in the middle area and then fold the outer portions of the buff toward the middle, over the filter material. Once that's done, I'll turn it back where the outside is showing, slip it over my head so the filter material covers my mouth and nose and I'm in business - I hope.