Contour mouse is designed to support your hand comfortably without the need to clutch the mouse to control it. Excessive clutching and finger flexing can aggravate the hand and wrist resulting in repetitive strain injuries. A pronounced arch on the top of the mouse gives your hand support from underneath. The specifically designed arch fills the hollow of your palm and allows you to rest your hand on top of the mouse. This promotes straight alignment of your hand and wrist while slightly elevating your wrist from the desk. Elongated buttons allow you to use the second knuckle of your finger to activate clicks which uses a stronger, thicker tendon. Contour Mouse allows you to rest your hand on top of the mouse and click buttons with small, subtle motions without flexing your fingers.