The NRG² was designed with a specific goal: to be the engine of the racket! That’s the main purpose of the NRG², the most powerful string in the range. It features a specific construction of over 1200 microfilaments made of Elastyl (12% more elastic than standard polyamide). It is deeply impregnated with polyurethane 400 to generate power and comfort. Lastly, the exclusive surface treatment: the S.P.L to provide smoothness and effective 'snap back' so you don’t have to readjust the strings during play. Welcome to the NRG²! With a gauge of 1.32, it guarantees increased durability.
