Wilson NXT Comfort Tennis Balls - Premium Extra Duty Felt for All Court Surfaces | Perfect for Practice, Matches & Training Sessions

Featuring proprietary xycro microfibers impregnated with PU for enhanced comfort and power, NXT is the world's most popular multifilament string. Sporting a larger sweet spot than traditional synthetic gut string and a fraction of its shock, NXT has stood the test of time for good reason. For installation, handle gently and avoid over-clamping and crimping.