The new and improved "Hi-Flow" SeaCURE Custom Mouthpiece replaces the previous "Sport" model. It offers an expanded port for increased air flow. It also includes a new one piece molding and sealing attachment. This device allows for easier molding and is then used to protect the regulator from debris and unwelcome guests during storage. The Seacure Hi-Flow model is available in all three sizes and still offers it's time tested, unbeatable security and comfort. It is the only moldable "and remoldable" mouthpiece offset for both the upper and lower jaw positions. SeaCure was created by an orthodontist, to fit your mouth, teeth and gums perfectly.