Black Friday Special! Buy 2 Sets of Head FXP Tennis String and Get 1 Set Free!! (Valid Nov 21st to Nov 29th Only) Thanks to HEAD's revolutionary string construction, FXP creates the maximum ball pocket for great power and ultimate control. Benefits: - FiberGel filaments for maximum ball pocket, great power and superior control. - Polyester filaments for added durability, control, and a crisp feel. Head Tennis String 281006-16-B2G1