For many office workers, sitting in a chair for multiple hours a day is commonplace. But the wrong chair can be, well—a pain in the butt (and neck and back). Choosing the right chair, however, can improve health, mood and productivity and prevent pain. Below, we detail the most important features to look for in a desk chair, such as adjustable support, arm rests, and a pivot mechanism. This infographic also includes ergonomic tips to prevent pain and injury. Keep in mind: While ergonomic chairs are designed to suit many people of different sizes, shapes, and needs, there's no guarantee one chair will work for everyone. Try out different features to see what suits each employee best.