Butterfly Tenergy 80 FX has a unique feeling using a combination of the softer FX version of Spring Sponge technology, High Tension rubber, and a tacky surface. It is excellent for a variety of playing styles due to its versatility. The designation of 80 in the name was adopted from Pimples Code No. 180, recognized for the balanced performance it offers. It also keeps its explosive power throughout the life of the rubber without the use of speed glue or boosting. Tenergy family of rubbers, Realize Your More! Surface: Inverted Speed: 13.25 Spin: 11.25 Density: 32 To get the most out of your rubber, it is recommended that you clean it after each use and store it properly. Using our Racket Care Kit, use one pump of the Spin Refresh on each side of inverted rubber, then use the Rubber Care Sponge to thoroughly clean it. Once it is dry, apply your protective sheets and then place it in your case. Ideally, store your paddle in a climate-controlled space and avoid extreme temperatures for extended periods of time.