This disposable N95 particulate respirator features the proprietary 3M™ Cool Flow™ valve and helps provide comfortable, reliable worker respiratory protection. It is ideally suited for hot/dusty work settings that require long periods of wear. 3M™ particulate respirator 8511, N95 is a disposable particulate respirator that is designed to help provide reliable respiratory protection of at least 95% filtration efficiency against certain non oil-based particles.