Yonex Poly Tour Force Tennis String — 16L (1.25mm) Yonex Poly Tour Force is a flat-profiled co-polyester monofilament engineered for players who want consistent ball pocketing and responsive power from a polyester string. Its unique flat-profile construction produces a more predictable, even contact feel than shaped strings, making it a strong choice for players at medium-to-fast swing speeds who want reliable ball flight and directional control without sacrificing the durability advantages of the polyester category. Flat Co-Poly Profile for Consistent Pocketing — Unlike hexagonal or octagonal shaped strings that generate spin primarily through edge bite, Poly Tour Force uses a smooth flat profile that emphasizes uniform ball pocketing across the entire contact surface. This produces a more even, predictable response than sharply-edged strings, giving players a consistent feel for ball depth and placement — especially valuable on flat drives, slice, and precise approach shots where predictability matters more than maximum spin. Responsive Power with Controlled Ball Flight — The Poly Tour Force compound is tuned toward the middle of the polyester stiffness spectrum — firm enough to suppress the excessive power that softer strings can produce at higher swing speeds, but elastic enough to return more energy to the ball than the stiffest control polys. The result is a string that feels lively and responsive without requiring players to constantly manage overhit balls landing long. Strong Tension Retention for Extended Playability — Poly Tour Force holds tension reliably across many playing hours, maintaining its characteristic feel and response for longer than natural gut or multifilament alternatives. Players who restring infrequently or prefer to maximize their restringing intervals will find Poly Tour Force one of the better polyesters for sustained consistency between string jobs. Durable Monofilament Construction — The dense polyester monofilament resists notching and breakage better than thinner multifilament alternatives, making it a practical choice for players who break strings frequently or play on abrasive hard courts where string wear is accelerated. At 16L (1.25mm) gauge, the string balances durability with just enough flexibility to maintain playable feel through extended use. Ideal Player Profile — Best suited for intermediates and competitive club players (NTRP 3.5–5.0) with medium to fast swing speeds who want the control and durability of polyester in a forgiving, even-feeling package. Particularly effective for all-court players who value placement and depth over maximum topspin — flat hitters and serve-and-volleyers will appreciate the string's responsive, non-aggressive character. Specifications — Gauge 16L (1.25mm), polyester monofilament, approximately 40 ft (12.2 m) per set. Recommended tension 48–58 lbs. String at the lower end of the range for maximum comfort; higher end for tighter control. Available as a single set (12 m). For spin-focused players who prefer a more aggressively shaped string, consider Yonex Poly Tour Rev or Poly Tour Pro — both use shaped profiles optimized for higher RPM topspin production.
