I carry and wear a 911 Card. It is laminated and I wear it around my neck. If I am unresponsive, medical personnel, rescue etc, can see the following

My Name, a contact number, my blood type, my medications, what I am allergic to, and any thing you might want to add. I talked to an air/rescue guy and he thought it was a great idea.........

just my tip to add,,,,,,,,,,,,,,,,,, I also love this post site