I have been using my 1960s vintage sewing machine to make Olsen style face masks.
I had a lot of white muslin from other projects for liners. After cutting into a couple reusable totes for an inner layer, remembered I had a huge sheet of non-woven polypropylene that came wrapped around a memory foam mattress pad.
I have bought a few pieces of quiltng cotton for the outer layer, but used a lot of remnants too.
I started out using t-shirt yarn for ties, then invested in a set of bias tape makers so am now making matching ties.