Some armours have special properties related to their use, usually designed to foil certain weapon properties. These armour properties are not standard to any of the normal armour seen on the next page, and can only be added through newly-crafted masterwork items. 
Masterwork armour can only be crafted from scratch by a skilled practioner. A masterwork armour item may add one of the following armour properties, depending on its type. A masterwork armour is by nature, of fine quality or higher. 
Light Absorbent, Efficient, Enclosed, Layered, Lightweight, Quick-escape, Reinforced.
Medium Absorbent, Efficient, Enclosed, Layered, Lightweight, Quick-escape, Reinforced.
Heavy Absorbent, Efficient, Enclosed, Layered, Lightweight, Quick-escape, Reinforced, Hardened.
Shield Lightweight, Hardened.
Property Description
Absorbent The armor is padded with thick batting made from special absorbent fibers. This tends
to wipe clean any sharp objects that penetrate it. The wearer of this armor has resistance to poison damage from poison-coated weapons, but not from the fangs of creatures that inject their venom as they bite.
Efficient This suit of armor is cunningly designed to be much easier to put on or remove. Halve the normal time necessary to don or doff such armor.
Enclosed This armor’s design mostly encloses the body with protective materials that are impervious to liquid. The wearer has resistance to damage from any liquid splashed on her, including contact poisons, defoliant, holy water, and the like. Caustic substances like acid and alchemist’s fire are not affected because their damage does not rely on absorption through the skin or a mystical reaction caused by contact with the flesh.
Ersatz Armour with this property are made from materials that are less-effective than what they are typically crafted from. For example, chain mail normally made with metal might instead be made with discarded metal scraps held together by rope. If the wearer of this armor suffers a critical hit, and it was not delivered by a weapon with the ersatz weapon property, the armor sustains significant damage. For every such hit, the armor suffers a permanent and cumulative –1 penalty to the AC it offers. Armor reduced to a protective rating of 10 is destroyed.
A crafter using the applicable artisan’s tools can repair this armor if it has not yet been destroyed. Each –1 penalty applied is repaired at a cost of 5% of the armor’s charted value.
Hardened The plating of this armor is particularly resistant to forceful penetration; the wearer’s Armor Class is not penalized for attacks made with the breach weapon property. To be fully protected, a shield-bearing character must have this property on both her armor and her shield, since the breach property can apply to either one.
Layered Rather than relying upon a single layer
of protective material, this armor uses multiple protective layers cleverly constructed to divert and trap missiles (or their fragments) that would otherwise stick in the wearer’s body. Attacks with cruel weapons do not stick in the armor wearer or leave behind pieces that must be removed. A harpoon requires at least 10 points of damage for it to bind and restrain the armor wearer.
Lightweight This armor is constructed with expensive, lighter materials. Light or medium armor reduces its weight by 4 pounds and removes the disadvantage modifier to Dexterity (Stealth) checks, if any. Heavy armor reduces its weight by 10 pounds and removes the Strength requirement. A lightweight shield halves its weight and removes the Strength requirement, if any.
Quick-escape This suit of armor, or its bulkiest portions, can be removed with a single action. This is advantageous when the armor might inhibit the wearer’s swimming, or it has been affected by a heat metal spell. Donning the suit is no faster than normal.
Reinforced This armor redoubles its protection over certain vulnerable spots. Weapon attacks made against the wearer do not benefit from the deadly or high-critical weapon properties.