Yonex Poly Tour Spin Blue 12m Set

For baseliners with medium-to-fast swing speeds looking for a shaped string that grabs the ball for the ultimate spin experience.

SIF (Silicone Infused Oil Technology):

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.