The Phase I ARC Trooper Armor filled the gap between the standard clone trooper armor and the sophisticated and heavy Katarn-class Commando Armor used by clone commandos. Phase I ARC armor was a full plastoid armor suit worn over a form-fitting bodysuit. It was equipped with heavier armor on the forearms, thighs, and chest, and had an advanced helmet that contained a hardened long-range comlink. A kama was worn around the waist, which offered extra protection to the legs and groin. Each armor set featured a built-in load-bearing harness and survival pack. It was the basis for Phase II clone trooper armor.