Tecnifibre X-One Biphase 18 Tennis String

A premium multifilament string, X-One Biphase delivers superb comfort, feel and a crisp response. A good choioce for players seeking an arm friendly string without sacrificing power. Provides good tension maintenance too.The best in the world for feel. Unprecedented dynamic qualities and outstanding durability for such a thin gauge string. The biphasic treatment increases durability by over 20%