These beans are some of the heaviest, smoothest, and most complex coffees in the world. Most of the coffees from Sumatra are dry-processed, but some are semi-washed. The majority of Sumatran coffee is marked Mandheling or Lintong and is grown inland from the southern coast. Sumatra coffee grown farther west is usually marked Gayo Mountain. Sumatra Gayo coffee is described as sweet and clean.