Recyclers can produce amazingly filtered smoke. You can only imagine what a bong like the 9" Double Swiss Recycler can pump out. Smoke enters the recycler by way of a circ perc downstem. Next the smoke has multiple pathways to travel with two circular swiss percs to each side and another chamber on top. With glass tubes connecting them all, the airflow will diffuse the smoke multiple times before inhalation. The bent neck of the 9" Double Swiss Recycler will help keep any water from splashing up.