It was a heavy combat armor that was used by the organization known as Justicars' Brigade

Justicars' Brigade Organization Planetary and Sector

during the Cold War

The Cold War Event Cold War (3653BBY - 3642BBY)

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Typically painted in shades of green, the basic kit included a breast, back and shoulder plates, gloves, leg plates and heavy boots. The complete kit also included heavy shoulder pads, additional chest and back plates, a heavy belt with slings, knee and shin guards. The armor was also compatible with a heavy powered backpack.
Due to their military background, it was rare to see a member of the Justiciars who was not clad in this armor, which they considered their regular uniform. While conscripts and militiamen were usually issued with a basic set of armor, mid-ranking officers had one or more additional components for their armor. Only high-ranking members, such as overseers and commanders, were equipped with a full set of armor.