of Resist Acid, Lightning, Fire or Cold
A character wearing armor or a shield with one such resistance will take only 1/3 of normal damage from attacks involving the relevant element of acid, lightning, fire or cold. Note that multiple permanent sources of resistance are NOT cumulative: wearing two is no better than wearing one. However, armor which provides resistance to acid cannot itself be damaged by acid, and this is a good reason to wear more than one such piece of armor.of Resistance
A character wearing armor with this ability will have resistance to Acid, Cold, Fire, and Lightning as explained in each part above.
Armor of Elvenkind
This is the same as Resistance armor, only generally better enchanted. It will make you more stealthy. This armor also possesses an extra resistance, at random from the following list: poison, light, dark, nexus, nether, chaos, disenchantment, sound, and shards.
Robes of Permanence
These robes are designed especially for wizards. Just like Elvenkind armor, they provide resistance to fire, cold, acid, and electricity and cannot be damaged by acid. They sustain all of your stats and protect you from a good deal of all experience draining. Also like Elvenkind armor, they have one random resistance.
Dragon Scale Mails
These extremely rare pieces of armour come in many different colors, each protecting you against the relevant dragons. Naturally they are all resistant to acid damage. They also occasionally allow you to breathe as a dragon would. Dragon Scale Mails can also have egos as well.