Armor serves one key purpose, to mitigate damage you would otherwise take. There are twelve types of armor each with it's own strengths and weaknesses. Armor lists are typically organized from light armor like robes to heavy armor like shell plate.

Not all creatures wear armor and instead rely on their own Natural Armor.

Natural Armor
Natural Armor Skill: {Spirit/2}
Protection: {Endurance / 6}
Focus Drain: 0 | Move Drain: 0
Avoidance Penalty: 0 | Stalking Penalty: 0
Asset Cost: 0 | Stones: 0
Stability: {Endurance} | Durability: {Endurance}