Unused, new, but the box has some dirt and crushing. Mouthpiece recommended by serious baseball players Clenching is necessary when generating great power. This mouthpiece protects your molars while efficiently supporting clenching when exerting force on your body! Compact size with a dedicated case! Not only for baseball, but also for various sports, studying, and when you tend to clench your teeth. Product condition: New, unopened Material: Silicone