FITS TO THE SHAPE OF YOUR MOUTH: One size fits all. Fits a range of mouth shapes and teeth sizes. Our mouth guard is suitable for upper and lower teeth. For those rare-cases that require a smaller fit, simply but carefully trim the out edge of each side. TEETH PROTECTION: The portable mouth guard can help against regular, persistent teeth grinding which can cause discomfort and wear to your teeth reducing the need to go to the dentist. MULTIPLE FUNCTIONALITY: The mouth guard offers 3 different applications. Teeth Grinding protection, sports injury reduction and also can be used as a teeth-whitening tray. TIGHT & RETENTIVE GRIP: The mouth guard moulds to your teeth for a comfortable fit. The mouth guard's thermo-plastic material can be adapted by submerging in boiling water then placing in the mouth to shape. Easy to Wear & Sleep Improvement: This anti-snoring mouthpiece is easy to wear and can be adjusted for a personalized fit, effectively enhancing your sleep quality. Notice: 1.Actual color as shown due to different light effect. 2.Please allow 1-3cm deviation due to manual measurement. Material: TPE. Package List: 3PCS Advanced Anti Snoring Device