For mid-to-advanced hard hitting players with more powerful spin. Fire off fast shots to dominate the court. Stretched under controlled temperature, YONEX strings deliver greater durability, reduced fatigue and consistent repulsion.
This new Silicone oil Infused Filament (SIF) technology–monofilament infused with Silicone oil–allows big hitters to experience ultimate spin from intense snapback speeds. Greater snapback produces a powerful spin. SIF Technology with unique pentagonal structure allows the string to move faster than conventional models, increasing spin.