Reliable material: The dental mouthguard for teeth grinding is made of silicon dioxide, which is safe, soft, durable and reusable, with a high fit, can provide comprehensive oral protection, and provide you with a comfortable experience. Reusable: Our night teeth grinding mouthguard is reusable, brush with a toothbrush and toothpaste after use, rinse, dry and store. The normal use time of the mouthguard is 3-4 months, please replace it in time. Widely used: Wear it as a night mouthguard when sleeping, protect your teeth during exercise, and the tooth guard can also be used with a whitening gel kit to whiten teeth. The oral tray is suitable for anti-snoring, teeth grinding, and teeth whitening; it is good for dental health, reduces noise, and improves sleep quality. Easy to use: Put the night teeth grinding mouthguard in warm water for 5-10 seconds, then take it out and put it on; the tray will automatically shrink to fit your teeth; it can be operated at home, simple and quick. Note: Soaking in boiling water for too long may cause the mouth tray to shrink too much. Value package: Great for whitening teeth and protecting teeth. We can protect teeth in all directions.Packaging: 4pcs