The Three Dimensional Maneuver Gear (立体機動装置 Rittai kidō sōchi?) is a set of gear developed by humans that allows great mobility when facing the Titans in combat. The gear allows the user to fight in a 3D space as opposed to a 2D one. The gear itself takes the form of a body harness that encompasses much of the body below the neck. Although the Gear can grant a skilled user tremendous mobility, it is a demanding art that requires strength, and skill, both of which must be honed through constant practice.