Color: Black & Blue Inside Includes Mouthpiece Case It fits securely and doesn't come off, It's not stuffy, and the thickness is just right, not getting in the way! To make it, put it in boiling water for about 10-15 seconds, and when it stretches a little and becomes soft, Attach it to your teeth, adjust it, and lightly bite down to fit. It's easy to make! If it doesn't fit the first time, you can repeat it 3 or 4 times to get a perfect fit! As a special bonus for a limited time, we're including a mouthpiece instruction manual for first-timers, and Furthermore! We're also including a plastic case, which we sell for 600 yen! Choose from: Blue Green Pink Yellow White Purple Dark Blue Black Skeleton Case If you don't specify a color for the mouthpiece case at the time of purchase, we will ship either a skeleton case or a colored case. Suitable for beginners to advanced users and can be used for various sports! When your bite is aligned, your physical ability and strength will increase, and you can expect improved sports performance! Mouthpiece Mouthguard Sports Martial Arts Mixed Martial Arts MMA ufc Bellator ONEFC RIZIN Pancrase deep Shooto Judo Wrestling Boxing Kickboxing Rugby Jujutsu Weight Training Weight Basketball Plastic Case Mouthpiece Case Mouthguard Mouthpiece