FitPro Ball Chair Adult Size - 22"L x 22"W x 31"HThe FitPro ball chair is a great alternative to traditional office chairs that provides ergonomic benefits by using your abdominal muscles to balance while you sit and work. This chair allows you improve your posture and strengthen your core, all while providing lumbar support to your back. These chairs are easy to transport thanks to its lightweight and compact design. Despite it's easy to move design, the frame is durable, making it a great option