This is possible due to recent advances that have produced finer Zyex filaments in the string core. According to Ashaway's Steve Crandall, the company has begun using these to produce new multifilament core packages with increased linear density and more cross-sectional strength. The results, he said, are thinner, stronger, lighter-weight UltraNick strings which provide softer feel, more power, and improved ball control, yet still offer the well-known Zyex playing characteristics and tension holding properties.
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