The Head MX Spark Tour Tennis Racket is made of a specially designed matrix of carbon fibers and a crystalline metal alloy. The pre-strung SPARK TOUR comes with a bigger head for more power which will make you perfectly equipped for your recreational game. This racquet will make sure that your first steps on the tennis court won't be your last. The alloys grain size is 1000 time smaller than that of a typical metal. The decreased grain size means increased performance or as the Hall-Patch Effect states smaller grains stronger material. The result is a lighter stronger and more powerful racket than ever before. Added bumper for racket protection. Primarily intended for senior ages.