Bedside Humidifier Filter 2.0 BundleWe've upgraded our filter to be better than ever! The new blue wrapped filter uses the same wicking paper as the original but now has an added pre filter layer to trap dust and larger particles from the air to stop dust before it reaches your fan. For use with all versions of Bedside or Nursery Humidifier (not Large Room Humidifier) Made from wood pulp Pre filter catches larger particles from air Filter core catches metals, minerals, and dust Replace