If you aren’t familiar, Road ID makes identification meant to be worn during a run or bike ride. I’ve had one for years in case I’m involved in an accident when working out alone and someone needs to know about my basic health or contact my spouse. I have worn it on the opposite wrist of my Apple Watch, but now I won’t have to.
Update: Of course, the iPhone has a feature like this, but I figure if I’m in such a bad bike crash I can’t tell responders who I am, my iPhone has probably shattered into a bunch of pieces. A simple bracelet may prove more reliable in an emergency than a phone.