Leitz Active Sitting Ball, Ergonomically Designed, 65cm Diameter, Includes Fabric Ball Cover, Hand Air Pump & 2 x Plugs, Ergo Cosy Range, Velvet GreyStylish and ergonomically designed exercise ball chair to keep you active all day Encourages back and core muscle movement to improve posture, flexibility and helps relieve back pain Ideal for use as a desk chair to keep you moving while you work Use for exercise such as yoga, gym ball or balance workouts, back stretching, physiotherapy and ab exercises Features a strong and durable carry handle to easily move from room to room Generous 65cm diameter