Also have a Stearns vest type that's inflatable by either pulling the CO-2 rip cord or can be inflated by use of a mouth piece, i.e., the huff & puff method - which I have given a trial and works well, but have never inflated using the CO-2.

Vest fits well and has some very useful fishing gear pockets, but on a real warm day, as with any fishing type vest, you'll know you have it on! I use it exclusively when fishing the deeper, fast moving water and especially waters new to me. When fishing the local warm water ponds from the canoe, just have one of those cushion type preservers.