ćCorrect Bad Sitting Postureć: Balance ball chair has good fitness effect, good injury recovery and rehabilitation function, especially for spine and pelvis exercise. It is safe to exercise and is not prone to injury.It also improves flexibility, strength, balance and posture. ćHigh Quality and Environmental Protection Materialć: More high quality ABS material, impact resistance, hardness and wear resistance is better.Balance Ball Chair is a special function chair which integrates fitness massage. ćHealthy Designć: A forward leaning ergonomic backrest helps keep your back straight. Unlike traditional chairs, the back tilts forward to keep the back straight, which helps you remember to maintain a healthy posture. ćPortable and Easy to Installć: Simple and easy to install, silent quality universal wheel, more friction resistance and stronger.The raised chair front baffle effectively prevents the balance ball from sliding out.