YONEX Poly Tour Strike is an excellent Tennis stringfor players who love hard-hitting. Poly Tour Strike is quite a long-lasting tennis string that helps improve the performance of the players. Best tennis strings for professional players and your sports clubs. Yonex Poly Tour Strike tennis reel is made of high-power polyester monofilament fibres. Yonex Poly Tour Strike boosts your confidence on the court and helps you dominate your opponents with attacking strokes.