This tennis string from the top brand Head is suitable for players who like to play with control. The Sonic Pro Reel is made of unique co-polymer polyester. Due to the flexibility of this material, the strings provide a comfortable feeling during the game. Thanks to the high quality of the polyester, the string can be used for a longer period of time. The strings are perfect for the damping of vibrations, to avoid any injuries. This roll contains 200 metres worth of string with a thickness of 1.30 mm.