5-layer face mask FFP2 NR Outside + inside: Non-woven polypropylene 25 g /m²; Middle layer: Triple layer of melt-blown filter material 3 x 25 g / m² Heat-sealed version, with elastic strap and nose piece Individually packaged in sealed bag EN149:2001+A1:2009 FFP2 NR The filter effect is 95% (BFE)