I'm getting two threads mixed up. Is that called cross threading? Anyway, there's some interesting thoughts here. I know my PFD keeps me afloat, I bought it untested, and for my weight and size, but it doesn't necessarily keep my face out of the water. I too swim with it on, though not always. Removing the small concern of solo swimming away from camp miles (or at least many minutes) from others by wearing it is a comfort. I can swim, but hey, so too could most drowning victims. I don't really live in fear (my kids would disagree), I just don't want to make a small, simple, stupid mistake. I also commit the PFD no-no when I use it as a floating chair on hot summer days. That's the real reason I might like to buy a basic model as a spare, so as not to compromise the good one I'd wear and rely on. Having a cheapish spare as a pillow, seat cushion, floating chair etc would be worth the extra weight in adding it to my gear list...maybe. Watching that cold water video posted by Dave04 was scary, but also very educational. I'm gonna share that with all my family members who play in and around water. Although we all tend to limit our playing time to summer months and water temps around 70F or more, this cold water boot camp info is good to know.