Fabric Ducting or Textile Diffusers or Air Sox are a form of diffuser that use a duct made out of fabric material to deliver air into a room. The sock diffuser is made from Flame Retardant Polyester material and delivers the air into the room via a variety of methods (Micro-perforations diffusers, laser cut perforations or fabric nozzles) depending upon the application and how far we want the air to travel and the velocity needed in the occupied zone.