Blackened Defias Leggings

The Blackened Defias Leggings are a set of leather pants that provides a bonus to strength and agility. It is part of the Defias Leather armor set.

Source
The Blackened Defias Leggings drop off Defias Overseers and Defias Taskmasters (Extremely Low 1% - 2%) in The Deadmines.