Fourth Element Women's Thermocline VestDesigned to be worn under a wetsuit, this vest provides increased thermal protection of the body core by the equivalent of an extra 2mm of neoprene, whilst being neutrally buoyant and maintaining the freedom of movement of the arms. It will virtually eliminate the feeling of water coming in through the zip and will enhance thermal protection considerably. On its own, or worn with Thermocline shorts, the vest is perfect for core protection for summer