I think you can pull that off. I never see those around here on anyone. I have never seen one up close or considered it as something I would need. My first instinct when I do see someone with one on is not "gun" when being worn by older folks, those with a disability, or on an adult that looks like he got beat up a lot as a kid 
. Of the people I have seen wear those ,in my travels, they did not look out of place. You would have to pull tissues out and offer them to old ladies, have bandaids ready for action, and pull out candy for the little kids from that thing as you say things like "back in my day..." to pull that off or just look crazy enough nobody will even notice it .
In all seriousness you can pull that off and look normal.
. Of the people I have seen wear those ,in my travels, they did not look out of place. You would have to pull tissues out and offer them to old ladies, have bandaids ready for action, and pull out candy for the little kids from that thing as you say things like "back in my day..." to pull that off or just look crazy enough nobody will even notice it . In all seriousness you can pull that off and look normal.
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