Fangrui Product Details Sleeping Aid Solutions: The Protection Gently Absorbs Around The Tongue, Preventing The Respiratory Tract From Clogging In The Throat, Reducing Snoring. This Leads To More Energy And Improved Memory. How It Works: The Protection Gently Sucks Around The Tongue, Preventing The Respiratory Tract From Clogging In The Throat, Reducing Snoring. The Anti-snoring Device Is Made Of Soft Silicone For Maximum Comfort Easy To Use: Insert Your Tongue Into The Hose, Gently Press The Silicone Ball Together, Adjust The Suction Power In A Comfortable Position And Prevent It From Falling Back Into The Neck. Wash It With Hot Water At Any Time Before / After Use. High Quality: This Is Made Of Soft Medical Grade Silicone And Comfortable To Wear. The Suction Power Can Be Easily Controlled By Applying Less / More Pressure On The Silicone Bladder, Thus Adjusting The Fit For The Wearer. Odourless And Non-toxic. Soft And Will Not Hurt The Mouth. Suitable For Use: One Size Fits All For Men And Women. Suitable For Anyone Who Snores, Grinds, Air Or Sleep Disorders. The First Use May Be Uncomfortable, This Is Normal.