Riveted Synthium Battleboots

Riveted Synthium Battleboots are a rare-quality equipment item that can be found within the instanced mission map Gorilla Grodd's Lab. Once equipped, it unlocks the Jah Kir feet costume style.

Source
The Riveted Synthium Battleboots can be found inside Treasure Chests encountered within the Gorilla Grodd's Lab mission map.

Treasure chest

 * Gorilla Grodd's Lab

Style unlock
Upon equipping the Riveted Synthium Battleboots, a character unlocks the Jah Kir feet costume style, which can be accessed at any time from the Style Window.


 * Jah Kir