This disposable N95 particulate welding respirator features a carbon layer and the 3MTM Cool FlowTM Valve. It is designed for applications where metal fumes are present including those with ozone* and nuisance level organic vapors**. Benefits Use in certain applications involving metal fumes Cake resistant filter media and flame resistant per ASTM D2859 Carbon filter layer reduces exposure to nuisance level odors 3M™ CoolFlow™ Valve Soft nose foam; adjustable noseclip and straps