Yonex Poly Tour Strike is a poly-based monofilament designed for players with long, fast strokes. This grey version packs a tad more power than the black version, but it still provides a high level of control on full swings. As a result, you'll find it easier to maximize stroke speed, resulting in easier access to pace and spin. It also offers above average comfort for a control string. Durability is impressive, making this a good option for string breakers. 

As the thickest gauge of Poly Tour Strike, this is recommended to players who want a little extra durability. 

Composition: Monofilament Polyester