The Comfy-Bite Mouthpiece by XS Scuba reduces jaw fatigue, and allows you to enjoy the diving experience longer. Designed like orthodontic retainer for your teeth, the mouthpiece allows the diver to completely loosen the bite on the regulator mouthpiece and allows it to lightly rest in their mouth, making this the most comfortable mouthpiece available. The Comfy-Bite Mouthpiece will fit on most any second stage regulator brand and models. The Comfy-Bite comfortable cured shape is made from durable, injected molded liquid silicone for long life. Included with the mouthpiece is nylon tie wrap for attachment to regulator second stage.