Nitrogen flushing is a technique used in food packaging that removes the oxygen from the pack to prevent oxidation and degradation. By using this method we are able to increase the longevity of the coffee and preserve freshness for 6 months. Nitrogen is a naturally-occuring, odourless, and food-safe inert gas. It is abundantly present in the atmosphere (we breathe it daily and are doing so right now) and it does not react with the coffee or affect its flavour in any way.