Reviv™ Mouthguard for Mewing & Jaw Alignment is a breakthrough tool designed to support your facial aesthetics and oral posture while you sleep. Crafted from 100% food-grade silicone, this comfortable nighttime mouthguard helps position your jaw correctly, promoting proper mewing technique and reducing clenching. By encouraging ideal tongue posture and jaw alignment, Reviv™ aids in sl... https://www.en-us-reviv.com