The top spin string used by Rafael Nadal. The Babolat RPM Blast is legendary. Since 2010 Rafael Nadal has used it and has celebrated dozens of tournament victories. The Babolat RPM Blast 100m is a high-performance string made of co-polyester. The octagonal cross section ensures extreme spin transmission and a unique feel. High acceleration and a sensitive touch make this string a real weapon on Grand slam standards. Rafael Nadal, Jo-Wilfried Tsonga and Samantha Stosur all rely on Babolat RPM Blast. What else do you need to know? Make sure you get them! Highlights: Atop string designed for competition players. enormous spin characteristics thanks to octagonal structure. More control with service and a great ball feeling. consists of dense Co-polyester and a cross linked silicone coating.