Protection class FFP3 Protects against the harmful effects of dust, solid and liquid aerosols. High filtration efficiency. Filters at least 99% of 0.6µ-diameter particles. Complies with EU standard EN 149:2001+A1: 2009 & Regulation (EU) 2016/425 (PPE). The anatomical shape, the nose clip and the inner sealing foam ensure tightness.