Timewarden's Leggings

Timewarden's Leggings are plate leg armor primarily for tanking.

Source
This item is sold by Alurmi inside the Caverns of Time in Tanaris for. They are heralded as the best Pre-raid tanking legplates when properly gemmed. They are comparable to/a marginal step up from Felsteel Leggings and Legguards of the Resolute Defender.