Optipillows EPAP Mask is the only EPAP device on the market that offers adjustable pressure. During inhalation, the membrane opens allowing users to breathe in easily. During exhalation, the membrane closes and redirects the expired air through a narrow opening on the side of the valve. This creates Expiratory Positive Airway Pressure (EPAP) in the mouth and back of the throat, which helps keep the upper airways open and prevents snoring. Based on the needs of the user, the pressure can be adjusted by rotating the patented valve sleeve to make the opening larger or smaller. Optipillows EPAP Mask comes as a kit which includes headgear, the proprietary EPAP valve, and 3 sizes of nasal pillows. It’s lightweight and comfortable, and does not require a prescription. Optipillows is reusable, lasting up to one year.