These silicone nasal cannulas are comfortable to wear and have no unpleasant odors, which sometimes occur with plastic nasal cannulas. The silicone material lasts a long time and remains flexible, and is not irritating to the skin. The green reservoir in the hose collects any condensation that may come with the Brown’s gas, so you do not get any droplets of water in the nose. This reservoir is easy to open to pour away the collected condensation water. The parts can be removed, but unfortunately cannot be ordered separately.