Craft, Armorsmithing DC 15
Any creature with at least a +4 Natural to their Armor Class can potentially be used to make masterwork armor. The type of armor depends on the original toughness (natural armor class bonus)of the resource creature.
A player with Craft: Armorsmith can make armor from the properly harvested (see Survival) hide. Consult the table below for how many skins are needed to make a particular size of armor. A Heavy Shield counts as one size category smaller and a Light Shield two size categories smaller.