PolyTour Fire is a string that is designed for big hitters looking for lots of control, spin potential and durability. Not surprising, being a firm monofilament polyester, that PolyTour Fire offers plenty of control. However, it still provides a surprising amount of feel and does not transmit too much shock and vibration, even on balls struck outside of the sweetspot. Yonex uses its Silicone Oil Infused Filament (SIF) process to manufacture this string. SIF reduces friction and in turn increases snap back and spin potential. PolyTour Fire also offers above average tension maintenance compared to other strings in this category.

• Gauge: 16L (125)
• Material Composition: Monofilament Polyester
• Colour: Red
• Length: 40 feet / 12 meters

• SIF 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.