The BABOLAT RPM Blast is an excellent choice for big hitters looking for an extra spin; this monofilament shares the same construction and copolyester composition. Octagonal (8- sided) cross-section adds the extra bite on the ball for added topspin and slice. New high-density copolymer polyester (PET) monofilament combined with a new cross-linked silicone coating provides even more spin and greater ball control.