ZQuiet is a type of anti-snoring mouthpiece designed to reduce snoring by gently advancing the lower jaw to keep the airway open during sleep. It's a single-piece device that fits over the upper and lower teeth, made of a non-toxic thermoplastic elastomer compound. ZQuiet is considered a Mandibular Advancement Device (MAD), which works by repositioning the jaw to help prevent the tongue from blocking the airway.