There’s a sleek new design option in balance ball chairs. Sporting a more sophisticated silhouette than our original Balance Ball Chair, the new, less bulky Ultimate Balance Ball Chair gives you great comfort and ergonomic back support while blending into any contemporary setting. It lets you engage your core, align your spine, and even increase your energy—all while you sit. The five-wheeled base provides a sturdy, stable foundation while offering added mobility in the home or office and the durable nylon and steel fabrication makes it built to last. You can easily remove the 55-centimeter anti-burst ball for exercising and stretches, too. And the easy-glide wheels provide smooth movement or lock for stability. Designed and made exclusively by Gaiam, the Ultimate Balance Ball Chair frame design is now patented.