Has anyone besides me seen this site? A Mask For All: requires a 3D printer I don't know who has a 3D printer where I am ... having said that: this thing you can download, for free if I get this right, and the 3D printer will make it and you assemble it. The mask frame has a place where you can insert filter material, thus you can clean the mask when not in used, and replace a used mask filter with a new clean one. What do you all think?
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