Mesh and polyurethane upper with mesh lining and firm heel counter for added support. Reflective heel tab. Ortholite X40 insoles set the industry standard for high rebound performance with an elasticity rating over 40%. Plus a spacer to customize the fit. High rebound ETPA Durocloud midsole with a carbon fiber shank for stability and support. Rubber outsole for durable traction. 392 Durocloud Walking Shoes