Armor quality

An armor quality, sometimes called an armor special ability, was the name of an enchantment that could be placed on a piece of armor. Pieces of armor enchanted in such a way usually made them more resistant to certain types of damage, enhanced the wearers abilities, or allowed them to hide or stealth easier.

Enchantment
In order to enchant an existing piece of equipment, a versed enchanter had to use a powerful spell during the process. However, not all pieces of armor could be enchanted. Some specific enchantments were limited to the type of material the armor was made from.

List of weapon qualities
For an extensive list, see Category:Armor qualities

Any armor

 * Negative energy protection: made the wearer more resistant to attacks associated with energy from the Negative Material plane.
 * Nimbleness: made the armor less restrictive, and reduced its weight.
 * Proof against transmutation: made it so the wearer's form could not be changed (polymorphed, petrified).

Metal armor

 * Blueshine: gave the armor immunity to acid and rusting, and allowed the wearer to hide more efficiently.
 * Everbright: made the armor incredibly bright, as well as providing the wielder with resistance to acid.