Tecnifibre X-One Biphase 15g Natural Tennis String

Tecnifibre X-One Biphase 15L Tennis String — Natural

The benchmark multifilament in its most powerful form. The Tecnifibre X-One Biphase 15L in Natural is the thickest gauge in the X-One line, delivering maximum durability and a fuller, more powerful response at impact. Its unique biphase construction blends two types of fibers to optimize both comfort and performance — producing a lively, arm-friendly feel that excels across all three key criteria: playability, durability, and string integrity.

A standout feature is the built-in wear indicator: significant fraying at the ball's impact point signals that it's time to restring — before the string breaks completely. A smart, practical feature that helps players stay ahead of unexpected breakage during matches.

• Gauge: 15L / 1.35mm
• Type: Multifilament (biphase construction)
• Color: Natural
• Performance: Maximum power, durability, and string integrity
• Wear indicator: Fraying at impact point signals time to restring
• vs. 16g/17g: Thickest gauge = most durable, most powerful
• Brand: Tecnifibre
• Ideal for: Players seeking maximum durability and power from a premium multifilament