Stop Snoring Mouth Piece - Anti Snore Device Sleep Apnea Cessation Aid Snore-Ex's anti snoring mouthpiece is an oral appliance also referred to as a Mandibular Advancement Device. The simple custom-fit mouthpiece positions and holds the jaw, opening airways for maximum airflow, thus reducing or eliminating snoring vibrations. More specifically, it provides a forward-positioning for the tongue, which is connected to the lower jaw. This increases airflow and minimizes the most common snoring cause - soft palette vibrations in the rear of the mouth. This is for adults only.