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> I got the cartridges that protect you from organic vapors and 99.7%
> particulate matter. The paper masks only protected me from roughly 90-95%
> of particulates and did nothing for vapors.

shawn I have the 3M 5000 mask (i think) $25 @ west marine and it came with the thin pre-filters. any idea how you attach them to the mask. there is a diagram on the bag that says there is a lever to open the cartrages, but my mask doesn't have a lever. Do you tape these pieces to the out side? Am I worring too much about it?