The Iron Masks wear their namesake helmet that covers a proportionate part of their head. Their attire resembles Greek/Roman soliders. They usually carry guns or swords for personal combat. In the Mazinkaiser manga by Go Nagai, the Iron Masks wear redesigned attire such as accented helmets, form fitting armor, and thicker battle skirts.
The Iron Masks appear to be of average intelligence as they require Dr. Hell and Ashura to guide them. For combat they are armed with gladius-like swords and guns like pistols and rifles. They also drive a large assortment of vehicles like tanks and Ashura's flying vehicle.