In Wrath of the Lich King it is item level 272 and requires level 80. In MoP Classic it is item level 251, 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 Lasherweave Trousers Compares
Who It Suits
Leather is the armor type Demon Hunter, Druid, Monk and Rogue wear. With Agility or Intellect, Lasherweave Trousers 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
Lasherweave Trousers is part of the transmog set Lasherweave Battlegear (Druid only). The other 16 pieces:
Built from the World of Warcraft client build files and recorded Auction House snapshots.
Where Lasherweave Trousers Fits
Other Items Named Lasherweave Trousers
1 other item in the current build is also called Lasherweave Trousers. 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 50820 (50812 to 50825) were usually added in the same batch as Lasherweave Trousers: the same quest line, zone, vendor or reward set.
Invincible's ReinsID 50818 · Miscellaneous · item level 30"Teaches you how to summon this mount. This mount changes depending on your Riding skill and location."