In Wrath of the Lich King it is item level 232, requires level 80 and is named Sunstrider's Leggings. In MoP Classic it is item level 245, requires level 80 and sells to vendors for 1c.
Read from the World of Warcraft client build files (JournalEncounterItem, JournalEncounterCreature, Achievement) and the Blizzard Game Data quest API.
How Sunstrider's Leggings of Triumph Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Sunstrider's Leggings of Triumph suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Transmog Sets
Sunstrider's Leggings of Triumph is part of the transmog set Sunstrider's Regalia (Mage only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Sunstrider's Leggings of Triumph Fits
Other Items Named Sunstrider's Leggings of Triumph
1 other item in the current build is also called Sunstrider's Leggings of Triumph. Same-name entries are usually a different rank, faction, quest stage or reward track of the same object.
Items Numbered Next to Sunstrider's Leggings of Triumph
Blizzard numbers items as they are created, so the named items next to ID 47770 (47765 to 47775) were usually added in the same batch as Sunstrider's Leggings of Triumph: the same quest line, zone, vendor or reward set.