Sumatra is a wet-hull processed coffee bean, the only that Rivet offers as a single origin. Processing is the method in which the cherry is removed from the coffee bean post-harvest and has a lot of impact on the final flavor of the bean. The wet-hull process is particular to Indonesia, where there is more than 200 rainy days a year. Beans are depulped immediately after harvest, fermented overnight, then cleaned. The beans are then dried until their moisture content is 11-14%. Most exporters dry the beans once again. The wet-hull process, combined with the terroir of the country, create a very flavorful, robust flavor with low acidity. We recommend Sumatra for those who are seeking a low acid coffee, but still want a traditional dark roast to enjoy all day. It suits all brewing methods and our baristas have used it as espresso within our cafe.