Thanks to a new technology created in the dental sector, today it is possible to achieve a perfectly physiological individual mouthpiece. Simply immerse JAX in boiling water for a few seconds and then clamp it between your teeth to achieve a perfectly stable mouthpiece that will ensure perfect comfort. Over 100,000 divers around the world have chosen JAX, the only mouthpiece able to guarantee fully comfortable and relaxing dives.Eliminates rubbing against the gums.Relaxes facial muscles.Protects the joints of the jaw.Eliminates mouthpiece headaches.