I checked out the site that Welshman provided (thanks, btw). I'll stick with my polar fleece for now and will report on how it does on our Dec 21st dives in the Chesapeake. I haven't had it cold enough yet to do a good test...Uncle Pug once bubbled...
...actually no. Same with the polarfleece.
I haven't tried my weezel with the CF200... but I will to see how it does.
O-ring... the weezel is not thinsulate... and it compresses down a great deal... you need extra gas to keep the loft and the thermal barrier.