Details: Designers of Steelcase Leap chair researched how people sit for over four years. The result is the Leap chair's patented Liveback technology which allows the chair to adjust dynamically, mimicking the movement of your spine. The Leap chair's seat moves when you move, the back moves when your spine moves- even the arms follow your movements. The result is a chair that is amazingly comfortable. The Steelcase Leap chair also has an unusually wide range of adjustment, allowing this chair to fit the broadest range of people possible.