stampa:For the emergency, Covid 19 I modified this mask. The original file can be found here: https://www.thingiverse.com/thing:4225667 the author is lafactoria3d I made a cylindrical filter block, which can be dismantled to facilitate washing and cleaning. In emergency it is possible to use make-up remover discs, for cosmetics. BE CAREFUL! I AM NOT RESPONSIBLE FOR THE TYPE OF FILTER MATERIAL YOU WILL USE. IF YOU DO NOT USE THE RIGHT FILTERING MATERIAL, THE MASK IS USELESS