Originally Posted By: oldsoldier
Rule of thumb; if there is a filter on it, and NOT in a sealed package, the filter is useless. Even the BEST filters in the worst possible conditions are, at best, rated for 24 hours. If you are purchasing gas masks that already have filters on them, they are worthless, unless you can get hold of new filters.


Remember the old rule about some "contaminates" causing the filters to go bad really fast?

How on earth were we supposed to change the filters on an M17 if we could not exit the contaminated area in time. Those things were a pain to change!!!
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I do the things that I must, and really regret, are unfortunately necessary.

RIP OBG