Babolat Introduces New RPM Blast Tennis String. Nadal, Tsonga and Roddick are Converts.

RPM Blast (Revolutions Per Minute) is a monofilament string that gives players more spin, more power and a unique feel at ball impact. “With this new string, I have more spin, and it helps me hit deeper..." explains Rafael Nadal.

via www.tennisidentity.com