3-ply ASTM Level 3 adult unisex masks are Health Canada approved and meet the highest criteria for Healthcare. They do NOT contain graphene, are soft, comfortable, fluid resistant and latex-free. Specs include bacterial filtration (BFE) of greater than 98%, particulate filtration (PFE) greater than 98%, differential Pressure mm H2O/cm_ <6.0 and penetration resistance mmHg 160. These are sized at 17.5 cm x 9.0 cm with a Flame Spread Class 1 standard.