The reason why you need to wear a wetsuit: men women youth full wetsuit could keep your body warm when you are in cold water. Working principle of the full wetsuit is to leave a thin layer of water on the body after the water enters the suit. The body continues to exercise to generate heat, heat and keep the body warm. The wetsuit can protect you from sun burning and skin scratch by marine life in the deep sea, and will not damage their skin by water pollution.