ASICS Women's GEL-Kahana 4 Running Shoe 100% Synthetic and mesh Rubber sole Contains reflective materials designed to enhance visibility during low light hours, Rearfoot GEL Cushioning System attenuates shock during impact phase and allows for a smooth transition to midstance Removable Sockliner accommodates medical orthotics, designed and built on lasts and molds that are tooled specifically to designated widths DuoMax Support System enhances support and stability, positioned sport specifically Trusstic System reduces the weight of the sole unit while retaining the structural integrity of the shoe Trail Specific Outsole has reversed lugs that provide uphill and downhill traction on all types of terrain