Product DescriptionPart of our Pro Series, the 3M Cool Flow Valve Particulate Respirator 8511 is designed with the pro in mind to help bring you protection and comfort. The Cool Flow Exhalation Valve helps release warm and moist exhaled breath from inside the respirator. This N95 respirator features Advanced Electrostatic Media that enhances the capture of airborne particles and is designed for easy breathing. An adjustable M-noseclip helps provide a custom, secure seal. Whether you're hanging drywall or sanding a floor, rely on the trusted protection of the 3M Cool Flow Valve Particulate Respirator 8511.From the Manufacturer3M Disposable Respirators are designed for exceptional comfort, durability and ease of use. They are NIOSH approved. The filter provides at least 95 percent efficiency to remove particles. They are effective against non-oil particles containing dusts and mists and are free of natural rubber latex.