Varier Human Instruments born of a human idea - Your body is engineered for movement. Activity is essential to its well being. A conventional chair is an instrument of inactivity, fundamentally unsuited to the human body. We don't make conventional chairs. We create precision human instruments to keep your body in its natural state of activity. Human Instruments Collection offers chairs for desk work, home office and dining, that promote movement and variation to keep the body in its natural state of activity. The unconventional design keeps the spine in its natural curvature and the spinal disks dynamic; blood circulation is active and oxygen supply is improved, leading to better concentration and overall well being. Features: -Multi-functional sitting instrument. -Portable, folds away, and support range of sitting position. -Creates an open angle between the torso and thighs. -Adjustable angle. -Steepest setting, multi balans places almost as little strain on the back as a standing posture. -Lowest can function as a child's chair and work table. -Strength your back muscles and chest is kept open for deep breathing. -Manufacturer provides 7 year warranty on wood and 5 year warranty on metal. -Overall dimensions: 25" H x 18" W x 23" D.-This item is non-returnable.