NX Economy brand dust/mist respirator mask is NIOSH approved to provide a minimum of 95% filtration efficiency against sold and liquid aerosols that do not contain oil. Use in enviroments with clay, cement, sulfur, cotton, flour, saw dust, coal, iron ore and TB. Valved respirator makes breathability easier and helps release moisture. Dust mist mask has two, latex free straps, an adjustable aluminum nose piece and a polyethylene nose pad. 10 valved masks per box.