Follow up question for NightHiker/Paramedicpete,

Only seeking an opinion :

When I get CPR qualified, what mask would be good to carry with me? Are they all pretty much the same? I saw one that contains an adult and child mask separately. Also, one that can be used for both adult and child.

I do not expect this information to be mistaken for medical advice or product endorsement.
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"Its not a matter of being ready as it is being prepared" -- B. E. J. Taylor