Read from the World of Warcraft client build files.
How Corruption Sifter's Treads Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Corruption Sifter's Treads suits Assassination, Outlaw and Subtlety Rogue; Brewmaster, Mistweaver and Windwalker Monk; Balance, Feral, Guardian and Restoration Druid; Havoc, Vengeance and Devourer Demon Hunter.
Transmog Sets
Corruption Sifter's Treads is part of the transmog set Khaz Algar Trophymaster's Leather Armor (Rogue, Monk, Druid and Demon Hunter only). The other 16 pieces:
Blizzard numbers items as they are created, so the named items next to ID 223950 (223945 to 223956) were usually added in the same batch as Corruption Sifter's Treads: the same quest line, zone, vendor or reward set.