Read from the World of Warcraft client build files.
How Astral Gladiator's Silk Hat Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Astral Gladiator's Silk Hat suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Astral Gladiator's Silk Hat is part of the transmog set Astral Gladiator's Silk Armor (Mage only), which the Appearances collection lists in 3 versions. The other 16 pieces:
Items Numbered Next to Astral Gladiator's Silk Hat
Blizzard numbers items as they are created, so the named items next to ID 230389 (230384 to 230394) were usually added in the same batch as Astral Gladiator's Silk Hat: the same quest line, zone, vendor or reward set.