The Mizuno Wave Rally 4 volleyball shoe features a mesh and synthetic upper that provides breathability, support, and comfort. Midsole Ventilation System reduces the heat and humidity build-up inside the shoe to keep your foot cool. Full-length EVA midsole offers excellent shock absorption and cushioning. Zigzag Mizuno Wave Technology uniformly disperses shock throughout the sole, adding cushioning and enhanced stability. Enhanced rubber outsole delivers improved traction and flexibility. Wt. 8.8 oz.