Heritage Armor
Double click the item and a transmutation window pops up. Drop the like item that you want to transmute into the heritage armor into this window. Click Transmutate.
Make sure you choose the right heritage armor, There is three kinds, one is light, another is heavy, and last one is medium. They will only work with there matching armor you are transmuting. So if you use light clothes then your not going to be able to use medium or heavy heritage armor transmutes.