Mizuno Men's Wave Bolt 4 Mens Wh-bk Volleyball Shoe 100% Synthetic Mesh Upper 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.