[Easy to use]: Simply wear this lip biting corrector like a mouthguard. Its lightweight and discreet design lets you use it anywhere, anytime, without any hassle. [Facial muscle training]: Strengthen and define your facial contours with this effective lip biting corrector. Say goodbye to sagging muscles and hello to a toned look. [Durable and long-lasting]: Invest in your oral habit and facial muscle training with this sturdy and resilient mouth breathing corrector. It's built to last. [Oral habit corrector]: Improve bad oral habits by reducing mouth breathing, finger eating, and lip biting. Transform your oral health with this revolutionary device. [Comfortable material]: Made of poe, this corrector is soft, flexible, and safe to use. Enjoy a smooth and pleasant wearing experience every time. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store