Wild Harvest - FCAviva 100% USDA certified Organic Wild Harvest - FC yerba mate. FC stand for fine cut. This Wild Harvest - FC is made from the same large leaf yerba mate we are famous for. It was designed to provide a more robust flavor profile as well as a good smooth finish. Since 2003, our partner/supplier has had an organic certification issued by Ecocert, This certification is current in the Americas, Europe and Japan.