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. Above all, the Bluefire is unbelievably fast with a characteristic high arc when top-spinning that enables maximum spin and increased speed. DONIC Bluefire M3 Characteristics: Perfect adjustment of the soft version with precise feel, excellent spin and perfect sound. Recommended for: Players that prefer soft rubbers with perfect control and good speed. Also for aggressive all-round players.