The 4 cuff charleston is an aireator model in defeet39s new high rouleur collection the aireator is the airflow design sock that changed how modern endurance socks are made with its trademark venting mesh weave foot durable stayfast cuff and plated heel toes that wear like iron the aireator guarantees long lasting performance made with coolmax174 ecomade the fiber that is made from recycled resourcesthe defeet aireator linetoday the aireator still leads in durability wickin