Stained Shadowcraft Spaulders

Heirloom Item
Heirloom items scales to the level of the character it is being worn on. It should last most classes to level 80 and can be mailed to a person's alternate character if they are on the same account.

Source
This item is sold by the following vendors for :
 * in Dalaran
 * in Dalaran
 * in Dalaran
 * in Stormwind City
 * in Orgrimmar

Characters that have earned the title may buy this item for  from  in the Argent Pavilion, at the Argent Tournament Grounds in Icecrown.

The are another leather armor shoulder item with the 10% experience bonus, but they include resilience, which is more useful as a PvP attribute than with PvE leveling.