For more spin and speed with every shot The Isospeed Pulse quakes with anticipation for the next shot. With the Pulse, the Austrian manufacturer Isospeed offers a spin happy string which proverbially catapults the ball over the net. The reason for this is the sensational elasticity of the mono-filament polyester strings. Low friction technology with a first class snap back effect meanwhile assure spin. Flexible molecules make the Pulse tension stable and assure optimum cushioning. More spin, more speed! Get your Isospeed Pulse and bring the game up another tennis notch. Highlights: string with high ball acceleration great spin potential minimal tension loss thanks to spring load technology second heating process (double heating) guarantees constant playing characteristics optimum cushioning and arm friendliness mono-filament polyester strings