Good ergonomics means the possibility of variation, flexibility and personal adaptation. RollerWave2 is significantly deeper than the wrist supports, and slanting more down to the table surface. In this way you have support not only for your wrist, but also your forearm and at the same time a gradual transition from table to keyboard/RollerMouse. The more even the support, the more neutrally your wrists work, and the easier it is on you.