ThermaFur is a specially designed thermal lining developed in conjunction with deboer engineers and some of the top athletes in the world. ThermaFur reflects the athletes body heat to keep them warm in cold-water swims. ThermaFur is a polyester based brushed thermal lining with a water repellent quick dry coating. The water repellent quick dry coating allows ThermaFur to be considerably lighter and more effective than traditional thermal wetsuit linings.