This disposable N95 particulate welding respirator with carbon layer helps provide respiratory protection where metal fumes may be present including those with ozone* and nuisance level organic vapors**. Features foam faceseal and 3M™ Cool Flow™ Valve. Benefits Used in applications involving metal fumes Carbon filter media reduces exposure to ozone/nuisance level of organic vapors Cake resistant filter media and flame resistant per ASTM D2859 Comfortable foam faceseal/fully adjustable straps 3M™ CoolFlow™ Valve helps keep wearer cool