Hi G., one of the things that people overlook in wearing farmer johns is their relative uselessnes in insulating the shoulders and upper chest. If it's cold enough to require a wetsuit and the wetsuit is being used to protect you for longer than 1/2 hr,and you are swimming in that toasty 62 degree Big Sur water I'd recommend a layer of fuzzy rubber over the torso and shoulders or a neoprene vest. Another item that's very versative and easy to store is a fuzzy rubber hood, it can fit in a pfd pocket or on your neck but will go a long way towards delaying hypothermia.