ASICS Men's GEL-Kanbarra 4 Running Shoe 100% Synthetic leather and synthetic fiber Rubber sole Shaft measures approximately 2.86" from arch Compression molded EVA midsole provides shock attenuation throughout the gait cycle GEL Cushioning System attenuates shock during impact phase Trusstic System links the rearfoot and forefoot and shores the midfoot Designed on lasts that properly cradle the foot