Joola ENERGY XTRA Summary - JOOLA ENERGY XTRA incorporates fresh glueing effect in a new dimension - For STRATEGY use (pimples in) Description - The 37,5 soft sponge with the inclusive speed glue effect provides for even more spin and speed - It is especially suited to players who put emphasis on control of their strokes without renouncing the advantages of speed glueing. Types available - Available in 1.8mm; 2.0mm & max (black and red)