The NRG² was designed with a specific goal in mind: to be the engine of the racket! This is the primary purpose of the NRG², the most powerful string in the range.

Specific construction: Over 1200 microfilaments composed of Elastyl (12% more elastic than standard polyamide). Impregnated throughout with polyurethane 400 to generate power and comfort.
Exclusive surface treatment: SPL to provide smoothness and effective "snap back", avoiding the need to readjust the strings during playing.

Color: Natural

Length: 660ft / 200m