We choose the high-pressure CO2 method of decaffeination for our teas as it keeps more of the original character intact. It is a very smooth and safely decaffeinated product with a better flavour and full colour. Carbon Dioxide is a natural part of the air and physically harmless. Very acceptable on their own but my tip is to add just a few leaves of a very high-quality tea to the mix, this improves the flavour significantly whilst adding little to the caffeine levels. Decaf, decaff, however you spell it, this stuff is the best!