Babolat Pro Hurricane is a firm and durable co-poly with remarkable control and spin. In order to improve the feel and comfort, Babolat utilizes a softening agent called Xtrem Futur Polymer. Although this is a firm string, our playtesters found it softer and more forgiving than a traditional polyester. With its ultra predictable and low-powered response, Pro Hurricane enables the player to attack the ball with full force when going for extra pace and spin. Intermediate and advanced players in search of control, spin and durability should give this co-poly a serious look. Gauge: 17/1.25mm Length: 40ft/12m Composition: Co-polyester Monofilament (w/Xtreme Futur Polymer) Shape: Round Color: Natural