We have been using RoadID's for a while now. Mainly, the bracelets. Great for kids. Great for adults. Anyway, we like them. They are inexpensive and provide emergency contact information, even medical information, on your person. Think they might still be on sale too. Usual disclaimer. Not affiliated, blah blah blah. Road ID - World Leaders in Runner ID, Cycling ID & Medical ID Tags So in addition to the bracelets we already have. We got a few new colors ones for the girls. And I got a new watchband style one that is more comfortable for me, although heavier with the buckle. And I also got a dogtag with silencer for when I don't want to wear a bracelet. The tag is shiny on the back. That is why I ordered it blank without putting something on there. Can you say signal mirror? You can see in the picture how clearly it reflected the wall in my garage, in the shade. So I thought I would slap together a small dog tag kit. Was gonna just to the whistle at first. But then I thought I would add a Boy Scout hotspark, then thought about a striker. What better striker than a knife. Wore it through a couple of hours of biking and my long tai chi class. No problemo.