The Kore Design® Wobble Chair is specifically designed to keep adults physically and mentally active when they are sitting at a fixed height desk. Ideal for the workplace or home office, this chair will help improve posture and strengthen the body's core throughout the work day. Adjustable height and gently-rounded base lets you sit comfortably but keeps your body moving so your mind stays focused and on task. Continuous movement while sitting increases Secondary Focus. Working at your desk or on your computer or tablet are no longer sedentary activities. A patented anti-tip safety ring on the base prevents tip-overs and falls. Assembles easily in 5 easy steps and is made with a thick comfortable cushion seat and a steel piston and base. Recommended age 14+ years