Fitness Balance Ball
Available at: Amazon.com
Boost your strength, energy levels, and overall bodily health, even while seated. Innovative seating solution turns standard balance ball into comfortable, posture-improving chair. 55-centimeter, latex-free, anti-burst ball is recommended for users from five feet to five feet, 11 inches in height. Adjustable legs and cushioned back with stable, secure metal base and easy-glide, lockable castor wheels. Includes desktop stretching and strengthening guide, and DVD with three 20-minute workouts and three ten-minute "express routines". "