Yonex Polytour REV String · 17g · White
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Intense bite and control from SIF technology* (Silicone Infused Filament)
*SIF technology is developed in cooperation with NANODAX
For baseliners with medium-to-fast swing speeds looking for a shaped string (8-sided) that grabs onto the ball for the ultimate spin experience.
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.