The NRG² was designed with a specific goal in mind: to be the engine of the racquet! 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. 1.32 gauge: Guaranteed to increase strength. PU 400: 400% elasticity for great comfort and dynamic performance. Elastyl fibers (100%): +12% elasticity compared to standard PA, providing enormous elasticity for maximum power. SPL final coating: Anti-abrasion coating for increased resistance. Multifilament construction 16 gauge 12.2m / 40 feet Colour: Black Style #: 01GNR142XB
