A shapable posture training device is disclosed herein. The posture training device can be shaped by hand to fit a wide variety of body shapes and postures and may address a variety of posture conditions. A shapable posture training device may include a pliable chassis configured to be worn against a thoracic spine region. The pliable chassis may include a shapable member that can be bent and shaped by hand. The pliable chassis may include a first rod receiver disposed in the pliable chassis and a second rod receiver disposed in the pliable chassis. The shapable member may extend from the first rod receiver to the second rod receiver. The shapable member may be bendable to alter alignment of a first centerline of a first bore of the first rod receiver and a second centerline of a second bore of the second rod receiver.