These scan fpp2 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 they are ideal for use with brick dust concrete and plaster hand sanding of wood and mdf masonry and metal working with power tools not welding loft insulation with a fpp2 protection level these masks are suitable for protecting against particles of between 2 5 microns such as fine dusts fumes aqu