Head Sonic Pro If your string dies before your session does, you chose wrong. Durability isnt optional when you play every week. HEAD Sonic Pro is built for players who train consistently and want a monofilament that delivers power without beating up the arm. Durable by design: Unique co-polymer polyester construction stands up to regular matches and weekly training. It holds when sessions get long. Comfort for a poly: Soft molecular structure adds a more forgiving feel than traditional stiff monofilaments. You get control without harsh feedback. Controlled power: Delivers impressive pop for a monofilament string. The ball leaves the bed with pace when you accelerate. Reliable touch: Maintains solid feel on volleys and controlled shots. Not just baseline powerusable performance everywhere. Built for repetition: Ideal for club players who hit often and need consistency from restring to restring. Built for players who show up every weekand expect their string to do the same. Features HEAD Sonic Pro is a durable monofilament co-polyester string engineered to deliver excellent control and comfort. Its soft molecular construction enhances feel and reduces vibration making it suitable for players who want precision with improved arm comfort. Specifications Material: Co-polyester monofilament Weight: 17 g (gauge weight classification) Dimensions: Length: 12 m (40 ft) Gauge: 1.25 mm (17g) Country of Origin: Taiwan Ships from Great Call Athletics. Please review product fit and dimensions before ordering.