This slouch-busting sling lets you sit comfortably for hours with effortless good posture. When you sit forward, the back support follows. Since the Nada-Chair follows your body with every move, you constantly enjoy firm, adjustable and dynamic support hugging your low back. "The Nada-Chair acts like an extra muscle that never tires," explains Arthur White, MD. By using the knees to stabilize the pelvis, muscles are relieved of their isometric tasks. The pelvis becomes a stable pedestal on which the spine can effortlessly rest with natural curves restored.