It is far less likely that a character will wish to produce a custom suit of armour. However, some high-level NPCs might be found wearing an exotic suit of armour, superior to that seen by anyone else.

When designing a suit of armour, you may apply any two features from the list below, so long as the features do not affect the same statistics at all. For example, the Agile feature, which reduces the Body of a suit of armour and increases its cost, cannot be combined with Layered, which reduces the Body but increases its Maximum Agility defence. The exception to this is Cost; you can apply a two different features if they both affect Cost.

Reinforced is not considered a feature, and does not count towards your limit of features.

You do not need to assign both features—in fact, you do not need to assign any features.

The armour is built using superior techniques, producing a more agile suit. However, these techniques require a master craftsman to perform, raising the cost of the armour. +1 Maximum Agility Defence, +5sp per Resistance. This option cannot be applied to Cloth armour.
Pairs With: Cut Resistant, Heavy, Inflexible, Lightweight, Padded.

The suit uses a lower-density material, reducing its overall mass at the cost of making it more cumbersome and difficult to wear. -1 Body, -1 Maximum Agility. This option can only be applied to Reinforced armour.
Pairs With: Inflexible.

Some nature of the armour makes it particularly resistant to cuts and chops. The armour provides +1 Resistance specifically against Slashing damage. +10sp. This feature cannot be applied to Reinforced armour.
Pairs With:

The armourer skimped on the quality of some parts of the design, producing a much heavier suit of armour, but reducing the cost. +1 Body, -5sp per point of Body (after this adjustment).

The armour restricts your movements in a number of ways. -1 Skill, -5sp times the armour's Resistance.

The armour is composed of multiple overlapping layers. This makes it more flexible, but heavier. This option can only be selected for Plate armour. +1 Body, +1 Maximum Agility Defence.

Using a more expensive material allows the armourer to reduce the overall weight, at the cost of a more expensive suit. -1 Body, +5sp per Resistance.

Sometimes, armour is just better in every way. Especially when constructed by the best armourers to be found. Your armour might feature stronger, lighter materials, or it might be perfectly balanced. -1 Body, +1 Maximum Agility defence, +15sp times its Resistance (but don't count the +1 Resistance if the suit is Reinforced).

The armour has a padded underlayer that makes it better able to absorb shock. The armour provides +1 Resistance specifically against Blunt damage. -1 Skill. This feature cannot be applied to Reinforced armour.

The armour has softer, more flexible portions underneath the major joints, increasing its flexibility without giving away too much protection. Reduce the armour's Skill penalty one step, but it loses one Resistance against Slashing damage. This option can only be applied to Plate or Mail.