Reebok Men's Premier Ultra 8 Running Shoe 100% Synthetic and mesh Rubber sole KineticFit construction - helps accommodate the changes in size and shape of an athlete's U-Form footwear lining technology that, when heated, shapes to your foot for a customised DMX Ride enhanced cushioning system designed for lasting comfort; DMX Shear vertical panel Soft, synthetic performance mesh upper for comfort, lightweight feel and minimal break-in; Open mesh upper promotes maximum ventilation for a breathable climate.