Yes, I was one of the ice divers. Wore a 5 mil farmer john with a 5 mil jacket, hood, and gloves on the same trip as MC. Same thing I wore in my "younger days" to dive California waters. I was still slightly cool by the end of a few of the Mayaguana dives. As I get older I find I get cold more easily. Course, I'm a better diver now than I was then so I don't work as hard at it. Last year I dove around Turks & Caicos at the same time of year and just about froze in a 3 mil fullsuit with 3/5 hooded vest. I'd rather be too warm than too cold, so I'd say it's better to err on the side of having too much protection.