Mares Jax Mouth Piece (Single)Jax is a customisable regulator mouthpiece. Available in various colours. To customise the mouthpiece, simply immerse Jax in boiling water for a few seconds, then squeeze it between your teeth. In this way you can obtain a customised mouthpiece that guarantees comfortable and relaxed diving. Jax can be applied to all Mares regulators. The strap is included in the kit.