For big hitters seeking additional spin, the BABOLAT RPM Blast is a great option; this monofilament has the same copolyester composition and construction. An octagonal (eight-sided) cross-section gives the ball more bite for increased slice and topspin. More spin and improved ball control are achieved by combining a new cross-linked silicone coating with a new high-density copolymer polyester (PET) monofilament. Strong baseliners looking for durability and spins to control the play frequently use BABOLAT RPM Blast. (And it seems to be working fairly well for Rafa.)