1st : 50 gsm spun bond non-woven (outside)2nd: 25 gsm melt blown non-woven3rd: 25 gsm melt blown non-woven4th: 50 gsm hot air cotton filter5th: 25 gsm spun bond non-woven (inside)
FDA and CE
Filtration – BFE ≥ 95Filtration – PFE ≥ 95