Decaf SWISS WATER Sumatra Mandheling. Grown on the Indonesian island of Sumatra, Sumatran coffee is known for its full body, low acidity, and complex flavor. With earthy, spicy notes reminiscent of dark chocolate and tobacco, this coffee stands out for its bold richness. The island’s volcanic soil, tropical climate, and unique wet-hulling process contribute to its distinctive taste. Perfect for those who love a deep, flavorful cup with a touch of spice.