Mizuno Men's Wave Lightning Z WH-BK Volleyball Shoe 100% Synthetic Imported Rubber sole Parallel Wave technology which uniformly desperses shock throughout the sole, providing excellent cushioning and enhanced stability Extra grade rubber. High traction grip to the floor Non-marking outsole. It does not mark the floor Dynamotion Groove increases flexibility and agility while minimizing forefoot instability Dynamotion Fit Technology relieves the stress the foot naturally places on footwear-eliminating distortion for the perfect fit