DONIC's Bluefire with its small long pimpled-in structure lends the rubber the best possible flexibility and sensational feeling. Above all the Bluefire is unbelievably fast with a characteristic high arc when top-spinning that enables maximum spin and increased speed. DONIC Bluefire M2 Characteristics: Excellent balance between speed catapult effect and feel. Recommended for: Players who like to play with Medium Hard rubbers and attach high importance to spin and speed with optimum feeling.