In the city limits you have to be wearing a life jacket. It's a bylaw. Outside of the city it has to be withitn a meter of where you are sitting. That's the federal law.
Honestly I'm not safety first person. If I was I would wear a life jacket wading. Over the years I've gotten myself in way more trouble wading then floating. When floating I do wear my lifejacket when flow rates are over 200 on the bow and when I have to worry about hypothermia. I weigh the risks and decide. This inflatable life jacket looks like one that I would wear wading.
Who hasn't got swept way while wading? It's certain a shock when it happens. Good thing it's not too hard to swim holding a fly rod.