WHAT'S INCLUDED - Our mouth guard set includes 8 mouth guards: 2 different sizes of supreme quality and designed, a teeth retainer case. A Custom Fit - NOOMYA Night Guard for Grinding Teeth offers two sizes: small & large with four pieces each. Follow the fitting instructions for a comfortable, customized fit with maximum protection. Comfortable to use - The ultra-comfort guard can be used as a dental protector, teeth whitening tray and sports mouthguard. Can be adapted to fit a wide variety of teeth alignments, tooth sizes & mouth shapes for optimal comfort. SAFETY - Made with BPA free premium grade material.Known for its multiple beneficial properties,our product is soft, flexible, comfortable, easy to remoldand durable. Mouth Guard for Grinding Teeth and Clenching - Our mouthguard is perfect for teeth grinding, an athletic dental guard and teeth whitening tray. Whether you are kid, youth or adult if you clench or grind your teeth and want to protect them, our bite guards are right for you.