ASICS Women's GEL-Express 3 Training Shoe 100% Synthetic and mesh Rubber sole Heel measures approximately 1.25 inches" Rearfoot GEL Cushioning System: Attenuates shock during impact phase and allows for a smooth transition to midstance AHAR Heel Plug enhances durability at initial impact Width Specific Designis built on lasts and molds that are tooled specifically to designated widths DuoMax Support System is a dual density midsole system positioned to enhance support and stability, positioned sport specifically P.H.F. (Personal Heel Fit) has two layers of memory foam line the collar and mold to the athlete?s heel, creating a personalized fit