For those who want NIOSH's highest-rated filtration efficiency in a disposable respirator, this provides a minimum filter efficiency of 99.97% against oil-based particles. Features the proprietary 3M Cool Flow Valve, which helps provide comfortable, reliable worker respiratory protection. It is ideally suited for hot/dusty work settings that require long periods of wear. Comfortable to wear and contours easily to help provide a good seal. Adjustable nose clip reduces the potential for eyewear fogging. Incorporates 3M's Advanced Electrostatic Media, a proprietary filter media with electrostatically charged microfibers designed for easy breathing. Suggested applications: welding, brazing, soldering, torch cutting and metal pouring.