Materials are style related items first introduced as content of a Booster Bundle in May 2016. Later they were available through collections contained in Time Capsules and vendors.
Materials can be used to overwrite the textures of style items including hair allowing unique and new looks of a player character's styling. They can be applied through options in the Style Window.
Materials with red obtainment are no longer available, though those might appear on the broker.
Materials with an behind the obtainment are available on completing the collections contained in the specific source stated.
The Chroma materials are basically not random, but getting the boxes which contain all the variants is random.
- Not tradable materials: Forge Chroma Metal materials, Unicorn Power Material.