Gaiam Ultimate Balance Ball Chair - Premium Exercise Stability Yoga Ball Ergonomic Chair for Home and Office Desk with Reinforced Base, Air Pump, Exercise Guide, Black

ALTERNATIVE DESK CHAIR: Featuring a new and improved modern design and construction with a durable reinforced base, combining both comfort and ergonomic back support to alleviate the stress and pains that come with sitting for extended periods of time. BOOST ENERGY LEVELS: Engages the core, aligns the spine and helps increase energy levels for a more productive and energetic day RECOMMENDED USER HEIGHT: Designed for users 5' to 5'11" tall and fits most standard-height desks. 300-pound weight capacity. INCLUDES: Removable 52-centimeter exercise ball, an easy-inflation air pump, 5 easy-glide lockable casters and a desktop guide that illustrates multiple stretching and strengthening exercises to help you stay active INFLATION INSTRUCTIONS: It may be necessary to re-inflate the ball after initial inflation to allow the ball’s material to stretch to its final size. Inflate ball with air, let stand for 24 hours, deflate 50% then fill again to 52cm height.