A cover assembly (204) for a control member (202), such as a joystick, for controlling a vehicle, the control member comprising a shaft (206) configured to be graspable by an operator's hand, the cover assembly comprising: a cover body (208) configured to encase the shaft, and comprising an external surface (208e); and a heating system (24') configured to heat the external surface of the cover body, the heating system comprising an electrical heating device (26'), such as a heating element.