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N95 mask with valve is good for smoke. Respirators with breathing valves aims to provide snug for wearers who need to wear masks for extended periods of time. The valve opens and closes according to the wearer’s breathing pattern. During inspiration, the diaphragm closes on the supporting structure and blocks the opening, thereby not allowing airflow through the valve opening, thereby protecting the wearer. During exhalation, when sufficient positive air pressure is reached, the membrane lifts and the wearer’s unfiltered breath is expelled through the valve.