Reforged Armor is the Artifact (AF1), Relic (AF2), and Empyrean Armor (AF3) sets upgraded to the initial stage of Item Level 109 before being further upgraded to Item Level 119 in their +1 form.
The NPC Monisette in Port Jeuno handles all upgrade processes. As of the February 2014 Version Update, all Artifact pieces are upgradable to iLevel 119, all Relic pieces to iLevel 109, and Head, Hands and Feet slots of the Relic pieces to iLevel 119.
Artifact Armor (RF1)
Relic Armor (RF2)
This category has the following 4 subcategories, out of 4 total.