Zenergy Ball Chair, Backless, Supports Up to 250 lb, Orange Fabric. Provides an active seating experience that may potentially increase concentration and retention. May help promote better posture and balance through building core muscle strength. Perfect for use in a variety of applications including collaboration spaces, lobby areas, meeting rooms and personal workspaces. Features covered anti-burst 17.5" exercise ball. Four powder coated legs and stationary glides for stability and durability. Remove legs and replace chair feet to provide another size option; height with legs 23", without legs 20". Designed by Thomas Walser. Part of the Safco® Active™ line designed to promote active movement throughout the day and engage major muscle groups to help combat the negative effects of inactivity in the office.