Grinding will cause tooth wear and tear, the teeth are easy to loosen and fall off, and it will also make the masseter muscle bigger and face shape. After wearing this product, the friction between the upper and lower teeth can be avoided, and the problem of molars can be effectively solved from the root cause. Features -Color:Sky-blue. - Material:Silicone, ABS. - Size: About6.40X3.80X2.30cm/2.52X1.49X0.90in. -After wearing this product, the friction between the upper and lower teeth can be avoided, and the problem of molars can be effectively solved from the root cause. - Training the occlusion to correct the root of the tooth, stop snoring, and also improve the occlusion and alignment of the teeth. - Take it and wear it anytime, convenient and fast. - It is to the touch, not easily deformed after long-term use, and easy to clean.