The Ashaway Dynamite 17 Soft tennis string features a Zyex multifilament core that provides increased power, resilience & prevents tension loss. The string uses a large number of micro-sized Zyex fibres that ensure greater elasticity & thus more comfort & power. The Zyex material provides superior tension maintenance & the braided surface ensures additional ball bite. The string is recommended for players seeking minimal tension loss & consistent performance. It has a 1.25 mm gauge & is supplied as a 12m (39.4ft.) long set.