The latest generation Orca Heatseeker Vest is a thermal base layer designed to be worn under a wetsuit in cold water to increase your warmth in the water. It can provide an additional barrier against wind chill in any type of outdoor water sports. The Orca Heatseeker Vest will be a valuable addition to any water enthusiasts’ gear bag. Materials 100% 2mm open cell neoprene Comfort The increased warmth and wind chill protection of this vest allow you to enjoy a range of water activities for longer.