It doesn't make any claims about CO.
Quote:
Provides real protection from hazardous airborne particulate matter, including smoke, dust, biological toxins and chemical agents
. I wouldn't consider it equipment to wear to fight a fire, but to keep your vision intact long enough to escape without smoke, dust, biological toxins and chemical agents interfering it might be worthwhile. There are things to consider besides CO.
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Better is the Enemy of Good Enough.
Okay, what’s your point??