4 layers N95 and KN95 face masks:
layer 1 nonwoven: 50g
layer 2 meltblown: 30g
layer 3 cotton: 28g
layer 4 nonwoven: 30g

5 layers N95 and KN95 face masks:
layer 1 nonwoven: 50g
layer 2 meltblown: 30g
layer 3 meltblown: 28g
layer 4 cotton: 30g
layer 5 nonwoven: 28g

Meltblown are more than 95% isolated.
All the products are CE marked and ISO13485 certified.