NIOSH approved for at least 95 percent filtration efficiency against certain non-oil based particles, the disposable 3M™ Particulate Respirator 8511 boasts the 3M™ Cool Flow™ Exhalation Valve to help reduce heat and moisture build-up inside the respirator. The m-nose clip adjusts easily for fewer pressure points while the braided, dual attachment head bands help provide a secure seal. This disposable N95 particulate respirator features the proprietary 3M(TM) Cool Flow(TM) Valve and helps provide comfortable, reliable worker respiratory protection. It is ideally suited for hot/dusty work settings that require long periods of wear.