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nc IA | 3M 8211 is a very good mask,
there are getting to be more and more N95 (95% efficient) particulate masks out there that have the exhalation port. That port (just a little flapper) really makes a difference in glasses not fogging up, and also allowing alot of the moisture you exhale to leave without soaking into the filter paper, which in turn makes the mask last longer in more humid / high exertion tasks.
http://solutions.3m.com/wps/portal/3M/en_US/Health/Safety/Products/...
I am the one who orders respirators - both dust and full face etc for the plant I work at during the day, and I do the fit testing. These fit alot of different facial profiles quite well and seal up good.
FWIW - very few contaminates actually need the protection offered by the much more expensive P-100 or 99.9% efficient respirators - During a hospital rotation for EMS classes the isolation rooms were protected by N-95's. Althought they did have P100's if the case was of a certain type.
Edited by FFJR 6/10/2009 15:19
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Good dust mask for corn dust
