Yonex Poly Tour Spin is a high-performance polyester tennis string designed for players who want maximum topspin and a solid feel. The unique pentagonal (five-sided) shape bites into the ball for superior spin generation on every stroke. This 1.25mm gauge string comes in a 12m cut from reel – enough for one full racket stringing. Made from durable polyester monofilament, this Yonex tennis string maintains tension well and suits aggressive baseliners with fast swing speeds. Ideal for players who use heavy topspin as their primary weapon on court.