Ergonomic design to provide optimal support High-curved back hugs shoulders and spine for less fatigue Removable lumbar pillow slides to your sweet spot for maximum comfort Plush fabric and high-density sponge for luxurious comfort Equipped with a high-quality metal swivel base for 360° swivel function Stable round base provides reliable support Non-slip foot pads enhance overall stability and floor protection Assembly needed. WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. See www.P65Warnings.ca.gov.