Were you looking for the collection (pseudo-set) of cloth armor called Shadoweave Armor?

Inv fabric felcloth ebon2020
  • Shadoweave Cloth
  • Item Level 70
    Disenchants into:
    Not disenchantable
  • Sell Price: 40Silver

Shadoweave Cloth is not available in-game. This is an acknowledged bug by Blizzard, even though there was an engineering recipe that lists this as an ingredient. It is likely it was replaced by Shadowcloth during development of The Burning Crusade.