The Sith battle suit was a remarkably flexible medium combat suit that was manufactured by Aratech Repulsor Company in the wake of the Jedi Civil War. The name was inspired, not developed, by the actual Sith Empire; Aratech hoped to profit from the organization's fame. This type of armor was white and black in appearance and provided a significant amount of protection while retaining a rather high level of flexibility when compared to other armors of that weight class.
Meetra Surik, or members of her party, may have acquired and utilized Sith battle suits during the First Jedi Purge.