This is the kind of life vest I have for my float tube and it's very comfortable. This story is very good telling what it's like to fall in the water and what happens next.
I think there could be a problem with our perception of what a life vest is supposed to do when we fall overboard. It's like bailing out of a plane, you have to pull the cord!
www.katu.com/news/7911107.html
Be SAFE!