The OASYS Oral/Nasal/Airway System™ accomplishes dramatic nasal opening by means of the "nasal buttons" that extend off the upper shield that applies a stretch to the inner nasal structure from within the mouth. Our research shows an increase of 14% volume in the nasal valve which can represent a 48% increase in airflow and reduction in resistance of the nasal passage by one half. (See Effect Of Intraoral Nasal Dilation Appliance Sleep and Breathing )