Designed for applications such as welding, soldering, and other operations in which metal fumes are present, including those present with ozone and nuisance levels of organic vapors. It can also be used in grinding, sanding, sweeping, bagging, and other dusty/hot operations. Features cake-resistant media and adjustable straps. NIOSH certified to have at least a 95% filter efficiency at removing solid and liquid particles (excluding those containing oil). The innovative "M" nose clip helps provide a good seal against the face. The 3M cool flow exhalation valve reduces heat and humidity build up inside the respirator.