The comfortable and effective device works by inserting a mouthpiece into your mouth and covering your teeth. The mouthpiece is molded to the shape of your mouth and you follow the easy-to-follow instructions provided. It keeps your jaw in a forward position while you sleep, opening your airways and thus preventing snoring. Instant relief from snoring, breathing difficulties and teeth grinding. There are many reasons why people snore. The most common is so-called "simple snoring," which is caused by fatigue, stress, obesity, alcohol consumption, nasal or sinus problems, and even sleeping posture. During sleep, the muscles of the mouth and throat relax. The tongue may droop during the sleep cycle and the vibrations of the uvula may translate into snoring. The innovative design of the Acusnore mouth guard solves this problem by gently pulling the jaw forward to keep the upper airway open, allowing air to flow freely. Inhale and exhale uninterrupted, allowing you to enjoy a quiet and peaceful sleep. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.