Features: New and high quality. The food-grade silicone material is safe and comfortable. The cleaning head is made of soft and flexible silicone, which does not damage the soft tissues of the oral cavity. It has a soft touch and maintains shape after long-term use. Ergonomic design with an arc size based on ergonomic and oral anatomical principles, fitting comfortably in the mouth. Comes with a dedicated storage box for convenient storage when not in use, making it easy to carry, clean, and maintain hygiene. Invisible and compact design provides a natural feel, allowing for smooth breathing and comfortable sleep. Double-string design helps prevent the tongue from collapsing during sleep, which may help reduce snoring and support uninterrupted sleep. Suitable for multiple environments such as bedroom, office, dormitory, airplane, and high-speed rail, helping to minimize disturbances to others due to snoring. Specification: Material: Food Grade Silicone Color: White, Black