This ThermoSmart Heated Tubing is designed exclusively for use with F&P SleepStyle Series Auto CPAP Machines. It includes an internal heated coil to help prevent "rainout" and improve humidification levels during sleep apnea therapy. F&P SleepStyle ThermoSmart CPAP Hose Tubing with AirSpiral technology has an insulating spiral and a heating spiral that work together to minimize condensation and reduce heat loss during sleep apnea therapy. 20% lighter than previous ThermoSmart tubes, SleepStyle's ThermoSmart tube with AirSpiral also reduces weight on the bed and pulling on your mask to promote comfort and stability. SleepStyle ThermoSmart Tubing comes complete with the guide elbow connector as shown. For proper operation, make sure the connectors on the ThermoSmart Breathing Tube click into position with the ThermoSmart connection on the back of your Sleep Therapy Device. For complete instructions review the documentation that came with your equipment.