The Posture Seat – the balance seat that helps improve your posture The Posture Seat is a designed balance seat capable of helping owners improve their posture every time they seat and work. Thanks to the seat´s ability to tilt forward and backward and even left to right the seat can help the owner to engage their abdominal, hip and back muscles in order to strengthen their core. This posture seat is unique because it can be used and sits on most chairs and even on floor.