User blog comment:Blood Reaper/Skyrim Dragon Armor/@comment-99.72.141.10-20111105175352/@comment-4552472-20111105181720

You can actually improve your armor. Using additional materials you can enhance an existing armor, and make it better that way. So, if you improve dragon armor without this perk, you can make it better. But with this perk you can imrpove it twice as much.