The Suctionaid is the only difference between this trach set and the Portex Blue Line Ultra Cuffed Tracheostomy Tubes. The Suctionaid lumen will clear the trach tube above the cuff. And like the other Blue Line Ultra series, this trach is constructed of a thermosensitive PVC material. The thermosensitive property gives the PVC material to mold and conform to the patient's anatomy when warmed by the patient's body temperature. The Blue Line Ultra trach is rigid initially; It softens after being placed within the trachea reacting to the patient's body heat.