You are out there hiking, biking, rowing, walking. Feeling the sun, rain, wind, snow in your face. But what happens if (god forbid) something happened to you? Would anyone know who you were? Or about your medical condition?
Well, then you need a RoadID. It's a stainless steel ID that is engraved with your contact info and then attached to a bracelet or shoe tag. Pictures here.
(Gosh, this sounds like a commercial.)
I've had mine for over 7 years now, and I love it. It's inexpensive, it makes me feel safer, and it lets me leave my driver's license at home.
Please consider getting one for yourself.