3m 8214 is a very good mask to use when welding. Cost about 8 to 10 dollars apiece,
3M Particulate Welding Respirator with Cool FlowTM exhalation valve
Recommended for welding, brazing, soldering, torch cutting, and metal pouring, as well as grinding, sanding, sweeping, bagging, foundry operations, lab settings, petrochemical operations and other dusty/hot operations.
Cool FlowTM exhalation valve helps the heat and humidity reduction in the respirator.
Has at least a 95% filtration efficiency against solid and liquid aerosols that do not contain oil.
N95 approved!
Used for solids such as those from processing minerals, coal, iron ore, flour and liquid or non-oil based particles from sprays that do not emit harmful vapors. It is also used to protect from metal fumes produced from welding, cutting and other operations involving heating of metals.
Features:
Adjustable noseclip
3MTMCool FlowTMExhalation Valve
Cake-resistant filter media
Fully adjustable straps
Carbon filter material
Faceseal
3M TM welding