Head IG Challenge MP tennis racket is ideal for powerful club players looking for a racket that provides great spin. Features include: Innegra Technology - is one of the world's lightest high performance fibers. Its extreme toughness together with Head's advanced carbon composite technology leads to a novel ultra tough hybrid composite. The Head Innegra hybrid-composite structure is integrated into the racket for shock absorption and improved stability. As a result, vibrations are reduced by up to 175% on ball impact providing unique control and precision. 16x19 string pattern allows the ball to sit on the string for longer giving more spin. Racket is supplied strung.