Tenergy combines the innovative Spring Sponge with High Tension technology to create a truly devastating weapon at the table. Butterfly Tenergy 25 , in various tests with Butterfly-sponsored world class players, proved to be the most suitable for playing close to the table. Tenergy 25 has pimples of a larger diameter than most other rubbers; this creates dynamic attacking play, enabling heavy rotation to be imparted on the ball; it is the perfect solution for players with strong and accurate attacking strokes. It also keeps its explosive power throughout the life of the rubber without the use of speed glue or boosting.