Rip Curl just shipped us a new batch of H-Bomb Heated Vests.  Great for use by itself, or under a wetsuit to add that much extra cold water range.  If you are braving the arctic waters of the north, slip this under a 5mm wetsuit and you will be well above the warmth of your typical 6mm suit.  Being only .5mm it can easily fit comfortably under a fullsuit, or when worn alone it is light weight and flexible.  According to the image above the heating element in the H-Bomb Vest covers much more of your body than leading competitors products.  Coming in at $300 the price of comfort and long lasting sessions in the surf doesn’t seem so high, and backed by Rip Curl’s excellent warranty I would say this is an excellent choice for adding diversity to your wetsuit setup.