The Wilson Cushion Aire Countour (WRZ4829) black replacement grip offers raised contoured tacky surface for added feel - patented vertical pores for rapid moisture absorption - tacky surface for secure grip. The raised ridge / contour of the grip helps to provide enhanced gripping feel so that it does not feel like the racket is slipping away from the hand.  Perforations helps to absorb sweat while the cushion makes it comfortable.