These Scan FFP3 Premier valved disposable masks are designed to cover the nose, mouth and chin. The construction is made of the filter material itself, and the exhalation valve makes breathing easier. The masks have elasticated retaining straps to keep them securely in place. In addition they have an adjustable nose clip and full PVC face seal for custom fitting. The non-irritating inner face piece ensures added comfort. To be disposed of after each period of work or 4 hour shift. FFP3 NR D With a FFP3 protection level, these masks will protect lungs against very fine particles (less than 2 microns). They are ideal for use with: Loft insulation Hardwood dust & cutting MDF Stone cutting Plastering Resistance to clogging These masks have passed the optional Dolomite clogging test, giving the user better breathing resistance for longer. The masks conform to EN149:2001 and A1:2009.