Read from the World of Warcraft client build files.
How Whisperstep Runners Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Whisperstep Runners suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Whisperstep Runners is part of the transmog set Runebound Regalia (Mage only), which the Appearances collection lists in 4 versions. The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Whisperstep Runners Fits
Other Items Named Whisperstep Runners
1 other item in the current build is also called Whisperstep Runners. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Blizzard numbers items as they are created, so the named items next to ID 247625 (247620 to 247630) were usually added in the same batch as Whisperstep Runners: the same quest line, zone, vendor or reward set.