Zenergy Ball Chairs will enlighten any environment with its fun and spunky attitude, while putting a bounce in the step of ordinary. Designed with a 17 1/2" anti-burst plastic exercise ball, height is 23" when fully inflated (height lowers slightly when occupied). Zenergy allows a little zip in your sit by providing movement that not only helps you sit comfortably, but also helps you concentrate and supports better posture and balance. Movement keeps your mind open, while keeping your body actively engaged, no matter if you're problem solving, or having a casual conversation. The ambiance inspiring mesh fabric cover is accented with four, powder coated steel legs with stationary glides for stability. Zenergy also comes with an air pump to help you inflate to a better state of mind. Designed by Thomas Walser. Global Educator Institute Seal of Endorsement.