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

ALTERNATIVE DESK CHAIR: Featuring a new and improved modern design and construction with a durable swivel base, combining both comfort and ergonomic back support to alleviate the stress and pains that come with sitting for extended periods of time.
SWIVEL BASE: Gaiam Ultimate Balance Ball Chair is now available with a swivel base, so you can make the most out of your workspace by moving around your desk and office with ease
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.