Boost your strength, durability, stamina, energy levels and overall body health with the balance ball chair. Get instant relaxation as soon as you sit on this comfortable chair which is snug as a bug in a rug. It comes in very handy especially if you work from your home or stay on computer for many hours in a day. Easy to assemble and indeed a great work out while working on this chair. A real back saver, this ball chair is convenient and adjustable to your preferred height. It is thousand times better than the regular chair.