ffp2 kn95 protective mask is made of 5 layers, 95%+95% filter. Can customized for 4 layers for tropical areas. Advanced Data: 50gsm Spunbond Nonwoven 25gsm Meltblown Nonwoven 40-50gsm Hot air Nonwoven 25gsm Meltblown Nonwoven 25gsm Spunbond Nonwoven Typical Applications: Personal Protection, Base Metal Manufacture, Pharmaceuticals, Laboratories, Foodstuffs e.g. Bagging, Powdered Additives, Powdered Chemicals, Sawmills.