This patented balance ball and ergonomic chair provides healthy, proactive sitting, while improving posture, reducing fatigue & building your core strength. We spend hours every day sitting on chairs, whether we're at the office or sitting at home. However, the human body wasn't designed for sitting in these chairs. Many ergonomic chairs claim to hold the body upright, but only for a short period of time. Shortly after, the posture muscles tire, causing the body to slump & slouch as the spine twists out of alignment. Eventually, the muscles weaken, ultimately leading to back pain and potential back injury. The Fit Chair helps in relieving stress & strain on the spine and aids in eliminating repetitive motion injuries. It also helps reduce, neck, back & shoulder pain. The Fit Chair is a made up of two components: a high quality burst-resistant ball and a movable base. Your postural muscles begin to work by simply sitting on the ball and adjusting your body to the bounce, sway & tilt of the ball. The constant adjustments you make while sitting on the chair helps build & strengthen your core muscles.