Turbulent Treads

Turbulent Treads is a token that is used to create a Feet-slot armor suitable for a character's armor class.

Source
This item is a reward from the garrison mission Miner Difficulties.

Created items
The Turbulent Treads will create one of the following, based on your class's armor type:
 * Boots of Elemental Torment (mail)
 * Fireflash Sandals (cloth)
 * Greaves of Vaulted Skies (plate)
 * Spireflame Boots (leather)