All you need is:
kitchen towel - comes out as one of the best textiles
thread
needle
nylon sock / elastic
If you do not care how beautiful the mask looks and "just" you only need protection, so sewing this facial mask can handle the fact that everyone has a thread at home and a needle, and some form of rubber band (or you can use a lanyard and tie it at the back of your head).
Fold and wipe the cloth (100% cotton), according to the size of the cloth - 8 pieces in size 17x23 cm came out. You can fold one piece in half to make the fabric more dense - about 17x11.5 cm. This dimension is more suitable for children, but also for adults is ok.
Make a few folds on the cloth and sew a rubber band made of nylons from both sides :)
And the mask should be washed thoroughly after each use, min. at 60 ° C, so I washed kitchen towels at 90 ° C, and ideally iron too :)