The outsole made by Vibram also works on trails if necessary, while the shock absorption and rolling stride feel are right at home strolling city streets. Durable metal lace rings and other strong materials predict a long service life. - The surface materials are suede and strong textile - Light, recycled fiber liner fabric - Light rock guards on the heel and tip - Breathable construction - no waterproof membrane - The EVA midsole has shock absorption optimized for hard walking The product does not contain PFC compounds