In case you missed it, the first two of the 16 planned free DLC packs for The Witcher 3: Wild Hunt have been released.
And though it's as simple as downloading the free content from the Xbox, PlayStation, or Steam stores, actually finding where to get the items in-game is not as easy.
For the Temerian Armor, you must go to the merchant Bram, located near the Woesong Bridge fast travel signpost in White Orchard. He's the guy you should've saved from the Griffin in one of the story quests.
For the new hairstyles and beards, you simply have to go to a barber in a major hub like Novigrad or Oxenfurt.