Quality grants small bonuses to an item depending on the type of item, up to a default maximum of 20%. Martial Weapons gain 1% more Physical damage per Quality. Armours gain 1% more Armour, Evasion, Energy Shield and Runic Ward per Quality. Rings and Amulets have a number of possible quality types that provide bonuses to specific modifiers on the item. Flasks gain 1% more Life and Mana recovery per Quality. Charms gain 1% increased duration per Quality. Skill Gems or equipment that grant Skills grant a specific bonus to their Skill based on their Quality.

Armour reduces Damage taken from Hits. By default, Armour only applies to Physical Damage. Damage reduction from Armour is proportional to the amount of Damage, and is more effective at reducing smaller hits.

Evasion Rating grants a chance to Evade enemy Hits, preventing them from Hitting you at all. Exact chance to Evade also depends on the attacker's Accuracy.

Energy Shield protects your Life by taking damage instead. Rapidly Recharges if you don't lose Energy Shield for a short time. Chaos damage removes twice as much Energy Shield. Damage from Bleeding and Poison bypasses Energy Shield to remove Life directly.