FFP2 protection level, these masks are suitable for protecting from particles between 2 and 5 microns For use with: Sanding of softwood, hand sanding MDF, ceramic tile dust, cutting slabs Exhalation valve makes breathing easier Moulded nose bridge with full face seal minimizing air leakage Soft comfortable mesh outer layer resists collapsing in regular use FFP2 NR - Approved to EN19:2001 + A1:2009