Yonex Poly Tour Spin is a shaped string that really grips the ball for more spin potential and durability. The pentagon shape of this string is very precise and helps you get your ball diving back into the court. Yonex pre-stretches their string under controlled temperatures for better performance and tension maintenance.
Geometric pentagon (5 sided) monofilament string offers tremendous amounts of spin and control. Excellent choice for hard hitters looking for added spin, control and durability. String used by Borna Coric (CRO) et Sabine Lisicki (ALL).