3M™ N95 Particulate Respirator- 8511 -10/BX -8/BX/CSThis disposable N95 8511 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. NIOSH approved for at least 95 percent filtration efficiency against certain non oil based particles 3M Cool Flow Exhalation Valve reduces heat build up inside the respirator Adjustable M noseclip reduces