In order to make this armor less frightening to the general public, Stark created a gold-colored version with a wide array of improvements over the original. The new armor used the three dimensional, collapsible micro-structure now common in Stark's suits, so that it could be folded up and stored in his briefcase while inactive. The chest-plate was streamlined so that it could be worn under normal clothing without being noticeable. The suit had a semi-rigid interior with 3D knitted metallic exterior of a lightweight iron alloy, providing the same protection as his old suit did. This was also the first suit to be equipped with a force field generator. Power was still provided by flat linear armature DC motors, rechargeable by solar power as well as electrical outlets, and motion sensing was still provided by negative feedback. The Mk II air pressure boot-jets provided limited flight; steering while flying was accomplished by bodily movement. Weaponry consisted of the chest-mounted Mk II Monobeam, a sledgehammer, hacksaws extending from the fingertips, hand drills, electromagnets allowing Iron Man to pull things to him and push them away, and an electrical field generator. Communications and sensor arrays consisted of a loudspeaker, short-wave two-way radio, radar, and a tape recorder. When one iteration of this particular armor was partially destroyed by the Melter, a super-villain who could dissolve iron, Stark built an exact copy using aluminium instead of iron, which was unaffected by the Melter's abilities.