http://www.kayakfishingsupplies.com/...fd-life/Detail
would have died two Springs ago if I didn't have the above PFD on while swimming for 45 minutes 1.5 miles off La Jolla point (and get picked up by a boat before hypothermia really kicked in)
Not only should you always have your PFD, but remember your sump pump, VHF, phone in a dry bag, whistle, and whatever else you think might save your ass.
Just my .02