The ultimate companion to the RollerMouse Pro3The Contour RollerWave3 accessory is the ultimate companion to the RollerMouse Pro3. The palm support offers a longer and smoother transition from desk to RollerMouse and keyboard because it is larger than the regular wrist rest on Pro3.Get even more comfort with RollerWave3RollerWave3 offers a longer and smoother transition from desk to RollerMouse and keyboard. This means your hands and arms can rest more flat, and more natural without tension. RollerWave3 also provides additional comfort for computer users with larger hands and longer fingers. The soft inner core is similar to memory foam and is covered with durable leatherette, giving a soft support to both hands and underarms and distributing pressure over a wider area.