Yonex gives us Poly Tour Strike a poly-based monofilament designed for players with long, fast strokes. Compared to the grey color of Poly Tour Strike, this string has a tad less power, but it isn't as dead as a traditional polyester string.
For competitive players who rapidly fire attacking shots at fast swing speeds; minimal performance decline even after competitive play
Yonex Poly Tour Strike (Grey)
Gauge: 16L/1.25mm - 17/1.20mm
Composition: Polyester Monofilament