Bob, ... I changed over to a Mustang inflatable so I use it while wading all the time. I'm not sure if it's Coast Guard approuver as a PFD in US or Canada. I believe so.
http://www.mustangsurvival.com/produ...hp?id=172&mc=5
Edit:
Ooops ... From the Mustang web site:
"The MD1165 (Deluxe Inflatable Fisherman Vest) and the MIV-10 (Inflatable Fisherman Vest) do not carry approvals from either Transport Canada or Canadian Coast Guard."