Narval CC is an alternative to using a CPAP machine. It’s a comfortable oral appliance that you wear while you sleep. Custom-made for comfort, the Narval CC holds your jaw in a forward position, expanding the space behind your tongue to reduce the airway collapse that causes snoring and obstructive sleep apnea.Provent nose plugs and nasal strips can be used as an alternative CPAP treatment device, and eliminates snoring for most users. Provent Therapy uses your own breath to create EPAP, which helps keep your airway open. When breathing in, a flap allows nearly unrestricted airflow. When breathing out, a micro valve closes, restricting airflow to create EPAP until the start of the next breath.