Gaiam Ultimate Balance Ball Chair (Standard or Swivel Base Option) - Premium Exercise Stability Yoga Ball Ergonomic Chair for Home and Office Desk - 52cm Anti-Burst Ball, Air Pump, Exercise Guide

This balance ball chair features a 52cm anti-burst balance ball for superior cushion and an easy-inflation air pump is included to keep your ball inflated to your optimal comfort level. The easy-glide lockable caster wheels keep the chair in place for added safety and the base has been redesigned based on customer feedback to offer additional stability and control. A Desktop Guide is also included to help get you started, illustrating multiple stretching and strengthening exercises. Designed for user heights of 5'-5'11" with a weight capacity of 300lbs.

• 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.