Fancloth
Fancloth is a material that distorts transmitted and reflected light in a way that makes it very difficult to see. Warder' cloaks are made of fancloth. It is manufactured with a ter'angreal in the White Tower.

References (Possible Spoilers)#

  1. In the Guide
    1. Guide - Fancloth is manufactured with a ter'angreal in the White Tower.
  2. In The Shadow Rising
    1. TSR,Ch26 - In the Age of Legends, fancloth was considered stylish. During the Shadow War soldiers wore it.
  3. In A Crown of Swords
    1. ACoS,Ch20 - The Watcher covers himself completely with fancloth so he cannot be seen.
  4. In The Path of Daggers
    1. TPoD,Ch2 - Fancloth is manufactured with a ter'angreal in the White Tower.