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String of choice for Grand Slam Champion and World Number 1 Angelique Kerber, Yonex Poly Tour Fire is a durable monofilament string that brings great playability to anyone's game. Poly Tour Fire features Yonex's Silicone oil Infused Filament (SIF) technol Read more..
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 intern increases snap back and spin potential. PolyTour Fire also offers above average tension maintenance compared to other strings in this category.