made in soft neoprene with nylon waterproof material, potect for you head in water. Good for do ... Manufacturer of Neoprene Helmet, Neoprene Hat, Neoprene Cap, Neoprene Hood, Lycra Hat, Rash Guard, Swim Cap Material: 3mm neopreneSize: adult and kidDecoration ... size adjustable.any questions, please contact sarah meng. neoprene swimming cap