Bee Sting Allergy Medical Alert Dog Tag Necklace or Keychain ID

I purchased this for my son, who is at the time 8years old. The item is OK and serves its purpose (a dog chain to let others know he has an allergy and my I contact info). I say that the item is OK, because the silencer can be pretty aggravating. It does NOT stay in place. My son was always complaining about it and I would have to help him put it back in place until recently I removed it. I liked the way the silencer looked with the dog chain but to constantly have to adjust it, ughhh.