A mouthpiece protects your teeth and gums when you clench, which can help prevent chips, cracks, and sore jaw joints on heavy days. It also gives you a consistent bite so you can brace hard without grinding enamel, and many lifters find it reduces jaw soreness after training. If you use our AIRWAAV RX1 for sleep, it can gently bring your tongue forward, which may help airflow and recovery overnight.