Keep in mind that polypropylene meltblown material (main filtering material) is used in surgical masks just as much, as well as polypropylene spunbond, but some

Keep in mind that polypropylene meltblown material (main filtering material) is used in surgical masks just as much, as well as polypropylene spunbond, but somehow they are produced in enough quantity everywhere in the world to satisfy demand of the whole world. The only extra material that surgical masks don't use is probably just "hot air cotton", but it isn't a filtering material, it's a spongy form making material and I doubt there is a shortage of it, given that KN95 and other FFP3/FFP2 masks that use it are available in many countries today and were available all summer.