Durability is the condition that a piece of Equipment is in. This value is displayed as a fraction (e.g., 35/40), and is displayed when an item is moused-over in the Character Window. An item's durability will decrease over time in combat due to wear and tear. ALso, when a player is killed, there is a 10% durability loss of all equipped items. (The exception to this is in Player vs Player combat, when there is no penalty.) If the player then chooses to revive at a Spirit Healer instead of returning to their corpse to resurrect, a 25% durability loss for all items, whether equipped or in inventory, will be assessed.
If an item is allowed to reach 0 durability, it becomes useless until repaired. Weapons will be used as though the player were unarmed, and armor will give neither stat bonuses nor armor bonuses. In order to restore an item's durability, the piece of equipment must be taken to a vendor capable of repairing it. For a fee, the item will be restored to its full durability. The cost of repair depends upon the quality of the item, its level, and the player's standing with the faction of the vendor performing repairs, if any.