Themistocles Helmets for sale are authentic and officially licensed versions of the real helmet worn by Themistocles in the movie. They are manufactured of 18 gauge steel. These beautifully detailed helmets feature an antique bronze finish. The Themistocles Helmets weigh approximately 4 pounds, 4 ounces. They are fully functional and wearable. They have a soft adjustable padded cloth lining.