System One / DreamStation Heated Tubing (6ft/ 1.83m) DS2 filter it means the sealing surface

it means the sealing surface moves with facial soft tissue rather than against the rigid underlying structure

Specify the pressure you’d like the machine to provide during the ramp period

AutoFit Headgear:  No more Velcro or clips

also uses the same headgear

System One / DreamStation Heated Tubing (6ft/ 1.83m) DS2 filter it means the sealing surfaceThis Slim Heated Tubing from Philips Respironics is designed exclusively for use with DreamStation (Original), DreamStation 2 & System One "60 Series" REMstar CPAP & BiPAP devices equipped with a Heated Humidifier. DreamStation Slim Heated Tubing delivers your precise, preferred level of humidity, regardless of outside temperatures and ambient humidity levels, while also protecting against rainout. When connected to your DreamStation, DreamStation 2