3M 9004V - Valved Dust/Mist Respirator, AS/NZS P1 has a stapled headband with an exhalation valve. It is for low resistance during exhalation and minimal inward leakage of air contaminants during inhalation. 3M Dust respirator has an optimum filter that assures 95% of filtration efficiency. It is widely used as a disposable face pack to offer protection against minute dust particles. It comes with 80% upon getting tested against 0.3-micron sodium chloride particles. There is comfortable fitting that possible due to the cup shape design and an aluminium nose clip with neoprene elastic band.