Head Sonic Pro Tennis String Set of Black 17g 1.25mm Running Shoe a proprietary rubber-like material emphasizing

a proprietary rubber-like material emphasizing elasticity in the frame’s flex

Our Slim FootShape™ fit is designed to give you the power and stability you need to reach full speed in each stride

The Softer side of Fast - Max cushioning

you’ll experience a perfect fit and a more focused ride

max comfort

Head Sonic Pro Tennis String Set of Black 17g 1.25mm Running Shoe a proprietary rubber-like material emphasizingThe monofilament SONIC PRO string is designed for club players who need a durable, comfortable string. Your weekend games and weekly training sessions require a durable string. Try SONIC PRO. Made of unique co polymer polyester in combination with a soft molecular construction, it provides great touch and a comfortable feel while giving you a lot of power for a monofilament string. 12 m 40 ft