THIS IS A MUST HAVE, YEAR- ROUND STYLE. THE SOLE IS MADE FROM NATURAL CORK AND LATEX AND IS IMPACT ABSORBING AND THE UPPER IS MADE FROM WOOL THAT HELPS REGULATE TEMPERATURE. WITH A UNIQUE SLIP ON DESIGN WITH MOULDED CONTOUR FOOT BED, ONCE YOU PUT THESE ON YOU WILL NOT WANT TO TAKE THEM OFF. MADE IN PORTUGAL FROM CORK THAT IS HARVESTED EVERY NINE YEARS, THIS IS A SHOE THAT IS ECO AND EGO-FRIENDLY.