Yes, but in order to contain those particular vast quantity of energies, the Helmet must be made of some of heavy duty material capable of holding said energies. It's only Logical!! I mean, it's not going to be made of the same material that the Iron Man's armor is composed of, but something vastly stronger and durable. In essence the Helmet not only contains and regulates his energies, but it serves as a form of protection as well.