We use the Mountain Water Process. It is a unique, chemical-free decaffeination process similar to the Swiss Water method. It uses clear glacial waters from the highest mountain in Mexico, the Pico de Orizaba, known as Citlatepetl in the local indigenous language. It works by immersing the green beans in water to extract the water soluble compounds, including the caffeine. The water is then passed through a filtration system to remove most of the caffeine while leaving the healthy compounds in place.