EN 149:2001 · Protection against nontoxic and annoying dusts up to 4 times the threshold limit value defined for the substance (TLV) · With nose bridge · The dolomite testing allowed using for more than six hours · Non-reusable. · Field of application: bagging cement, gypsum, grain, drilling, threshing, against allergy caused by flour dust, grinding, sawing, milling, swine flu, bird flu, etc.Attention: observe expiry date! (about 5 years from date of production)