Another popular option is a , which is equipped with two pressure settings instead of one. On this device, one setting is for the prescribed pressure for inhalation. The other setting is a lower pressure for exhalation. Many users feel that dual settings make it much easier to get air in and out of their lungs throughout the night while using the . Oftentimes, high-pressure strengths make it difficult for users to exhale against the incoming air. If you struggle with this, you may benefit from a with dual settings.
