Safco Zenergy Swivel Ball Chair leans, bounces and spins 360 degrees for an active seating experience that encourages good posture, core muscle strength and may help increase concentration. Designed with a rubber-molded anti-skid base for stability on all floor types, it offers the posture benefits of a yoga ball without the rolling. Weighing only 13. 5 lbs. , this anti-bust swivel ball chair supports up to 250 lbs. , making it ideal for waiting areas, conference rooms or even classrooms. Its low profile design allows it to fit neatly under work surfaces when not in use. Choose polyester mesh or easy-to-clean vinyl in a variety of vibrant colors to cover the outside of the ball chair. Vinyl choices offer simple wipe-down cleaning and are recommended for educational environments. Part of the Safco Active Collection Safco Active products are designed to promote active movement throughout the day and engage major muscle groups to help combat the negative effects of inactivity in the office