Tennis Strings * | Tecnifibre X-One Biphase String

The Best Multifilament String For Power, Feel, And Comfort.

1. Pu 400 Inside
> 400% Elasticity For High Comfort And Dynamic Performance
2. 50% Elastyl Fiber, 50% H2C Fiber
> Power And Tension Maintenance
3. Biphase Process
> 20% Increased Durability