Fill your work space with vibrant energy that also brings a sense of calmness with the Zenergy Swivel Ball. Anti-burst, PVC exercise ball is covered in vinyl and features a 360-degree swivel base with active, user-controlled movement. Rubber is molded into base so this chair does not slip. Design allows a little zip in your sit by providing movement that not only helps you sit comfortably, but also may help you concentrate and support better posture and balance. Use this 17-1\/2" diameter, innovative seating as a complementary chair to your everyday seat. Or use in meeting areas and gathering spaces. Weight capacity is 250 lb. The Zenergy Swivel Ball Chair includes a pump to help you inflate to a better state of mind.