Gear with an extra bonus
From some information hidden in Star Wars Galaxies credits, we can realize a little clue of the fact that players can get some extra XP from the future versions of heirloom gear. Presently, you can get up to 20% bonus for two pieces of heirloom gear, with the chest and shoulders each giving 10%. In the future, a spell called Heirloom Experience Bonus +5% can grant an extra 5% XP. That means you will see pieces of heirloom gear with an extra bonus on them, which may be gloves, a cloak, or belt. In the end, the total bonus XP would add up to 25%.