The Swiss Water® Process uses pure green coffee extract and proprietary carbon technology to remove caffeine from green coffee beans. Coffee is polished and then soaked in very hot water where the caffeine is agitated out of the beans' cellular material to create green coffee extract. The solution is then passed through a carbon filter. They have specified the pore size of the carbon to match the caffeine molecule to ensure only the caffeine is trapped when the caffeine is captured from the green coffee extract. The Swiss Water Process is certified organic and 100% chemical free.