Butterfly Tenergy *5 rubber is and has a unique feeling using a combination of Spring Sponge Technology. High Tension rubber and a tacky surface you can depend on. It is excellent for imparting a great deal of spin on the ball. *5 in the name was adopted from Pimples Code No. 5. Tenergy *5 enables a full range of topspin play at or away from the table. It keeps its explosive power throughout the life of the rubber without the use of speed glue or boosting. Tenergy *5 is very popular among world-class table tennis players. European Champion Timo Boll uses Tenergy *5 on forehand and backhand.