The game's collection data lists Sha-Skin Leggings as sold by a vendor NPC in Warspear.
Vendor
Zone
Map
Waypoint
Other items it sells
NPC #88569
Warspear
-
-
166
Vendor NPC, zone and position come from the client's collection source tables (CollectableSourceInfo and CollectableSourceVendorSparse); coordinates are the in-game map readout.
Build history
First seen in build 5.5.4.69585 (Mists of Pandaria).
(2) Set: Increases the damage done by your Corruption spell by 10%, increases the damage done by your Incinerate spell by 5%, and increases the damage done by your Shadow Bolt, Touch of Chaos, and Demonic Slash by 2%.
(4) Set: While Dark Soul is active, your damage is increased by 10%.
Bonuses activate at 2 pieces and 4 pieces equipped.
Read from the World of Warcraft client build files.
How Sha-Skin Leggings Compares
Who It Suits
Cloth is the armor type Mage, Priest and Warlock wear. With Intellect, Sha-Skin Leggings suits Discipline, Holy and Shadow Priest; Arcane, Fire and Frost Mage; Affliction, Demonology and Destruction Warlock.
Similar Items
The 10 items nearest to Sha-Skin Leggings (item level 40) in item level among Armor > Cloth, Legs slot, from item level 32 to 42.
4 other items in the current build are also called Sha-Skin Leggings. 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 87189 (87184 to 87194) were usually added in the same batch as Sha-Skin Leggings: the same quest line, zone, vendor or reward set.