Shirt of Concentration
The shirts of concentration are magical undershirts found in the treasury of King Kobold’s lair. They aren’t much to look at, but they can be worn underneath armor, and when donned, provide the wearer with a one time boost of 6 Ability Points in a specific concentration (eg. STR, DEX, CON, INT, WIS, CHA)
The party found a large stock of shirts, which Bryan sent the remainder of back to the bandit camp for safe keeping.