ServitorTech Boots are a standard-quality equipment item encountered during the tutorial mission The Awakening. Once equipped, it unlocks the Fourth World feet costume style.
Source[]
ServitorTech Boots can be found within the second treasure chest encountered within the Brainiac Harvester Ship mission map, encountered during the tutorial mission The Awakening.
Treasure chest[]
Style unlock[]
Upon equipping ServitorTech Boots, a character unlocks the Fourth World feet costume style, which can be accessed at any time from the Style Window.