3D printing filament (PLA) is itself porous, even at so called "100% fill". It won't hold water, let alone stop smoke, viruses or chemicals.
Wanstalls: thank you for doing the right thing on this. Breathing apparatus is not something people should cheap out on or do half-assed.
Wanstalls: thank you for doing the right thing on this. Breathing apparatus is not something people should cheap out on or do half-assed.
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