LavaCore is by Oceanic. Pinnacle uses Merino wool. Pinnacle now has 2 types of vests. One is 5mm neoprene lined with Merino wool. The other is V-skin which has no neoprene, just a tri-laminate (whatever that is) and Merino wool.
I found this thread because I am trying to find out if anybody has tried the V-skin. I am thinking about getting it to go with a 5mm for the Galapagos. I normally dive 7mm in California and would like less mm for this trip.
ah! my mistake!
but i did get lavacore to replace my old scubapro hoodie... much better...