This string uses PU (the same material used for cushioning in your shoes) to dampen shock for a soft

Advance to a new generation of string technology with Luxilon 4G 125 660 tennis string

Utilizes an innovative

#1 choice for coaches and players

Pro-Tec 3D Flat Premium Calf Support Size:Large This string uses PU (thePro Tec 3D Flat Premium Calf Support provides customized compression zones which offer support exactly where you need it most. FLAT KNIT technology allows for customized stitching to achieve 3D shaping of the fabric to deliver an optimum fit. Its recommended for use for minor to moderate calf tightness and strains. Anatomically shaped design provides optimum fit. Vertical elasticity allows for a better range of motion. Provides increased flexibility.