The XR-3 string is a special multifilament in the range as its construction with 3 larger diameter monofilaments provides a "crispy" feel that could be translated as a dry feel in addition to the qualities of comfort, resistance and power. The particularity of this range is to present a wear indicator, which allows the player to change the string before the complete breakage. This indicator is manifested by the significant fraying of the string at the point of ball impact. Thanks to the assembly of several hundred microfilaments, impregnated in liquid polyurethane, Tecnifibre offers players the opportunity to gain in power and performance. Main material: Polyamide, polyurethane, silicone finish Recommended tension between 22 and 25 kg Maximum tension: 32 kgs Not recommended for heavy string breakers (< 10 hours of play). String made in France. PU 400: 400% elasticity for great comfort and dynamic performance. 3 Monocore PHP (Polymer High Performance): Specific construction with a larger diameter to increase durability and firmness. Polyamide fibres (544) Guarantee elasticity and ball feel by combining with the PU 400. They provide tolerance in case of off-centre hits. S.P.L final coating Anti-abrasion coating for more resistance. BEST SELLER IN JAPAN The string is sold as the best all-round string.