Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Double-Padded Slippers Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Double-Padded Slippers suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Double-Padded Slippers is part of the transmog set Felfume Raiment (Priest, Mage and Warlock only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 128075 (128070 to 128080) were usually added in the same batch as Double-Padded Slippers: the same quest line, zone, vendor or reward set.