Yonex Poly Tour Fire

This string is designed for intermediate to advanced players with medium-to-fast swing speeds. If you rely on aggressive, topspin-heavy groundstrokes and want a string that helps you generate extra pace, this is a strong choice.

SIF stands for Silicone Infused Filament. This technology increases the string's snapback, meaning the main strings slide out of place upon impact and quickly return to their original position, which helps you generate more spin and responsiveness.

Poly Tour Fire offers a livelier, more responsive feel than many traditional, stiffer polyester strings. While it is still a monofilament, the silicone infusion gives it a slightly softer, more dynamic sensation at impact.

The 16 gauge is the most durable option, while the 17 gauge offers the most feel and spin potential. The 16L is a middle-ground option, providing a balance between durability and performance.

Yes. The combination of the monofilament construction and the SIF technology is specifically engineered to enhance snapback, which is the primary mechanic for generating heavy topspin.