Partner, I admire volunteers I really do, but if you are working in places where you need a vest and you are not armed, you should volunteer your time in something a bit safer.
Of course, thats my opinion. I see you live in Cali, and it seems that California has some very strict personal weapons laws. But if you do get a vest, you should probably look at what the corrections officers wear versus what officers wear. Officer vests provide ballistic protection, and a knife will go through it.
You know the difference between a job and a duty? A job you can refuse to do because it's dangerous; a duty you must do even if it is dangerous.
Normandy Officer Amanda K. Cates DSN 215 Killed 08/29/2006 Rest in peace kiddo you were loved and will be missed terribly. Justice is coming.