THE FLEXIBLE SOLE MADE FROM NATURAL CORK AND LATEX ON THIS SLIP-ON SHOE IS IMPACT ABSORBING FOR A COMFORTABLE ALL DAY WEAR. THE UPPER IS MADE FROM WOOL THAT IS WARM IN THE WINTER AND COOL IN THE SUMMER. MADE IN PORTUGAL FROM CORK THAT IS HARVESTED EVERY NINE YEARS, THIS IS A SHOE THAT IS ECO AND EGO-FRIENDLY.