An artificial turf surface comprising fibrous materials, such as fibers, filaments andor tapes, and if applicable infill materials, wherein the artificial turf surface additionally comprises one or more additive that reflect light, characterized in that the additive is or are incorporated in the fibrous material, preferably located at the surface of the fibrous material. The materials being capable of doping and dedoping lithium included in the inner layer and in the outer layer may be the same or different from each other. In addition to the backup data streams, backup metadata is generated for each backup data stream. The method may include donning the garment by inserting a limb of an animal or human through an opening in the proximal end and positioning the compression sleeve such that the material extends over at least a portion of a muscle mass of the limb. The current pattern for the EC-motor can thereafter, for example, be determined in a microcomputer disposed in the motor control for the control unit, without the motor having a rotor position determination.