The N95/FFP2 medical graded mask has a BFE greater than 95% and around 99.7% of Airborne Particles. The product is tested according to EN 149:2001 + A1:2009 and NIOSH method (Sodium Chloride (NaCl)) Aerosol Test for 3D Filter Mask. The European Standard EN 149:2001 + A1:2009 specifies minimum requirements for filtering half masks as respiratory Protective devices to protect against particles except for escape purposes.