Badeendje, 3 days ago I am by no means an expert. I’d guess the active carbon in the filters. No definitive answer, but it’s about the filtering abilities: www.google.com/search?q=why do ffp masks have a s…
I am by no means an expert. I’d guess the active carbon in the filters.
No definitive answer, but it’s about the filtering abilities: www.google.com/search?q=why do ffp masks have a s…