· Heavy, ball-crushing spin from SIF technology
· For advanced players who can create their own power looking for a shaped string

^*SIF technology is developed in cooperation with NANODAX

SIF

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.