The Butterfly Nakama S2 Table Tennis Racket is a hybrid of wood and carbon fiber layers. The wooden surface outer plies are followed by a thin layer of carbon fiber. The addition of the carbon fiber will make the blade lighter, stronger and stiffer. This provides a larger sweet spot than an all-wood blade and will therefore be more consistent.Sapphira offers a touch more speed than our Flextra rubber. Still a great blend of spin and speed whether attacking or defending. The medium-hard sponge of Sapphira provides more direct play as the ball will come off the racket more quickly than a softer sponge.