Q - What about things we can't equip?
A - Short answer, No. Long answer, essentially let's say you play a Death Knight. If a quest reward offers you a shield, or you loot a shield, that shield will not be added to your wardrobe. If you cannot equip the item, it will not be added. That being said, even if a Death Knight can equip a cloth helm, it still will not be added to your wardrobe because it is not meant for your class, at the same time, the if you got Class:Warrior tier, it still won't count. So to clarify, you must be able to equip the item, it must be of your primary armor type, and it must be able to be obtainable and equipped by your class. Once these terms are met, then the item will be added to your wardrobe.
Resumen, si eres placas y consigues tela, no lo desbloqueas
FUENTE: http://es.wowhead.com/guides/transmogrification/legion/frequently-asked-questions