The Energy Force 12 Shoe is the latest edition in the Energy Force Series from Butterfly. Energy Force 12 has many of the benefits of its predecessors such as NC Rubber, P-Gel, Magic Ventilation and other popular features. "Quick Counter" was designed for Energy Force 12 by analyzing the footwork of top players. Quick Counter is installed in the heel to prevent sliding due to the intensive side to side footwork. The Energy Force Series from Butterfly is jointly-developed and produce by ASICS.