Tecnifibre NRG2 16 130mm provides bite on the ball with good power while maintaining tension Utilizing their Elastyl fibers which gives more power than standard synthetic string materials throughout this multifilament strings leads to a more elastic string giving easy power and a comfortable feel NRG2 features the SPL technology Silicium Pyrogene Lubritec an abrasion resistant coating to increase the durability Tecnifibres PU Inside technology to bind the multifilament fibers together provides up to 400 elasticity for the ultimate comfortable feel for touch shots A perfect combination for the player seeking a string with power and comfort Also check out the line of Tourinspired Tecnifibre racquetsConstruction Multifilament polyamideColor NaturalGauge 130mm