This thermal neoprene hood will help you cope with the coldest waters, providing maximum thermal insulation in both the head and neck. The Thermal X thermal lining provides added warmth, helping to trap heat and avoid heat loss throughout your workout. In addition, the neck cover provides thermal insulation and minimizes the body's contact with cold water. The shape of this product helps it fit perfectly to your head, so it will stay put during your workouts. In addition, the soft lining provides increased comfort. The neck cover prevents water from getting into the chest area, helping to maintain body temperature.