Mizuno 9-Spike Franchise Low G5 Baseball Cleat (Little Kid/Big Kid) 100% Synthetic Synthetic sole Dynamic synthetic leather for durable body construction with lateral stiffening overlays Parallel Wave Technology provides cushioning and stability simultaneously Patented 9-Spike configuration is lightweight, comfortable and provides aggressive traction and stability Proflex construction is engineered to provide a controlled flex for all three primary baseball movements: running, batting and throwing