The TubesRun provides premium perforated leather with synthetic overlays. Features full-length cylinders for excellent flexibility, support and stability. Padded collar with achilles heel notch for added mobility. Textile lining with removable, molded-EVA sockliner. EVA midsole provides maximized cushioning and enhanced durability. Flexibility is enhanced by anatomically correct flex-grooves. Rubber compound outsole provides unsurpassed durability from heel-to-toe.