3M #8293 valved respirator is the highest class available in a disposable respirator. P100 respirator is 99.97%n efficient in oily environments. #8293 respirator is a premium respirator with the 3M cool flow exhalation valve for easier breathability and cool, dry comfort and faceseal nose area for a soft and secure fit for long-lasting comfort. Suggested applications include Lead, MDA, Arsenic, Cadmium, welding and pharmaceutical manufacturing. Sold individually.